./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe025_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-cde23df-m [2024-06-14 13:27:07,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:27:07,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:27:07,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:27:07,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:27:07,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:27:07,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:27:07,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:27:07,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:27:07,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:27:07,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:27:07,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:27:07,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:27:07,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:27:07,976 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:27:07,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:27:07,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:27:07,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:27:07,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:27:07,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:27:07,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:27:07,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:27:07,978 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:27:07,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:27:07,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:27:07,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:27:07,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:27:07,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:27:07,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:27:07,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:27:07,982 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:27:07,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:27:07,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:27:07,982 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:27:08,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:27:08,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:27:08,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:27:08,204 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:27:08,204 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:27:08,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe025_rmo.yml/witness.yml [2024-06-14 13:27:08,396 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:27:08,397 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:27:08,397 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-14 13:27:09,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:27:09,758 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:27:09,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-14 13:27:09,785 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135138691/39c5e324d5a14c4f98580f068f5d3af5/FLAG91128d18f [2024-06-14 13:27:09,797 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135138691/39c5e324d5a14c4f98580f068f5d3af5 [2024-06-14 13:27:09,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:27:09,799 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:27:09,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:27:09,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:27:09,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:27:09,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:27:08" (1/2) ... [2024-06-14 13:27:09,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407270ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:27:09, skipping insertion in model container [2024-06-14 13:27:09,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:27:08" (1/2) ... [2024-06-14 13:27:09,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77b43a8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:27:09, skipping insertion in model container [2024-06-14 13:27:09,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:27:09" (2/2) ... [2024-06-14 13:27:09,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407270ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:09, skipping insertion in model container [2024-06-14 13:27:09,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:27:09" (2/2) ... [2024-06-14 13:27:09,808 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:27:09,923 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:27:09,925 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-14 13:27:09,925 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-14 13:27:09,926 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-14 13:27:09,926 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:27:09,926 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-14 13:27:09,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:27:10,246 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:27:10,257 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:27:10,441 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:27:10,478 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:27:10,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10 WrapperNode [2024-06-14 13:27:10,482 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:27:10,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:27:10,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:27:10,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:27:10,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,565 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-14 13:27:10,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:27:10,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:27:10,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:27:10,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:27:10,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,607 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-14 13:27:10,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:27:10,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:27:10,628 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:27:10,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:27:10,629 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (1/1) ... [2024-06-14 13:27:10,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:27:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:27:10,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:27:10,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:27:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:27:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:27:10,689 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:27:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:27:10,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:27:10,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:27:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:27:10,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:27:10,692 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:27:10,863 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:27:10,865 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:27:11,326 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:27:11,326 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:27:11,751 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:27:11,751 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:27:11,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:27:11 BoogieIcfgContainer [2024-06-14 13:27:11,752 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:27:11,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:27:11,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:27:11,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:27:11,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:27:08" (1/4) ... [2024-06-14 13:27:11,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a63c84 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:27:11, skipping insertion in model container [2024-06-14 13:27:11,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:27:09" (2/4) ... [2024-06-14 13:27:11,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a63c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:27:11, skipping insertion in model container [2024-06-14 13:27:11,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:27:10" (3/4) ... [2024-06-14 13:27:11,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a63c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:27:11, skipping insertion in model container [2024-06-14 13:27:11,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:27:11" (4/4) ... [2024-06-14 13:27:11,759 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-14 13:27:11,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:27:11,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:27:11,773 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:27:11,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:27:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:27:11,905 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 13:27:11,906 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:27:11,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:27:11,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:27:11,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 13:27:11,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:27:11,925 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;@7d5ed720, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:27:11,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:27:11,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:27:11,929 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:27:11,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:27:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:11,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:27:11,931 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)] === [2024-06-14 13:27:11,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1919912340, now seen corresponding path program 1 times [2024-06-14 13:27:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:11,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387482744] [2024-06-14 13:27:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387482744] [2024-06-14 13:27:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387482744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:13,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:27:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781407555] [2024-06-14 13:27:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:13,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:27:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:27:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:27:13,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:27:13,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:13,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:13,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:27:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:14,602 INFO L124 PetriNetUnfolderBase]: 1205/1913 cut-off events. [2024-06-14 13:27:14,602 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 13:27:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3820 conditions, 1913 events. 1205/1913 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9496 event pairs, 800 based on Foata normal form. 1/1878 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-14 13:27:14,618 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 37 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-14 13:27:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 191 flow [2024-06-14 13:27:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:27:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:27:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 13:27:14,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-06-14 13:27:14,630 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 71 transitions. [2024-06-14 13:27:14,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 191 flow [2024-06-14 13:27:14,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:14,638 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 13:27:14,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 13:27:14,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 13:27:14,644 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 13:27:14,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:14,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:14,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:14,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:27:14,645 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)] === [2024-06-14 13:27:14,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1800216043, now seen corresponding path program 1 times [2024-06-14 13:27:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027273039] [2024-06-14 13:27:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027273039] [2024-06-14 13:27:16,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027273039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:16,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:16,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:27:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924665080] [2024-06-14 13:27:16,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:27:16,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:27:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:27:16,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:16,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:16,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:16,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:16,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:16,900 INFO L124 PetriNetUnfolderBase]: 1400/2132 cut-off events. [2024-06-14 13:27:16,901 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-14 13:27:16,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4878 conditions, 2132 events. 1400/2132 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10186 event pairs, 654 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-14 13:27:16,913 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 48 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-14 13:27:16,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 272 flow [2024-06-14 13:27:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:27:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:27:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-14 13:27:16,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 13:27:16,918 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 90 transitions. [2024-06-14 13:27:16,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 272 flow [2024-06-14 13:27:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:27:16,922 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 13:27:16,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 13:27:16,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 13:27:16,925 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 13:27:16,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:16,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:16,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:27:16,930 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)] === [2024-06-14 13:27:16,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1532372759, now seen corresponding path program 1 times [2024-06-14 13:27:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602109675] [2024-06-14 13:27:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:16,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602109675] [2024-06-14 13:27:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602109675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:20,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:27:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603445976] [2024-06-14 13:27:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:20,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:27:20,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:27:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:27:20,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:20,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:20,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:20,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:21,123 INFO L124 PetriNetUnfolderBase]: 1391/2117 cut-off events. [2024-06-14 13:27:21,124 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-14 13:27:21,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5386 conditions, 2117 events. 1391/2117 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10088 event pairs, 485 based on Foata normal form. 6/2121 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-14 13:27:21,136 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 13:27:21,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 390 flow [2024-06-14 13:27:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 13:27:21,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:27:21,139 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 124 transitions. [2024-06-14 13:27:21,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 390 flow [2024-06-14 13:27:21,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 370 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:21,141 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-14 13:27:21,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 13:27:21,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-14 13:27:21,142 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-14 13:27:21,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:21,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:21,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:27:21,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:21,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash 521210856, now seen corresponding path program 1 times [2024-06-14 13:27:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:21,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308280057] [2024-06-14 13:27:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:22,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:22,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308280057] [2024-06-14 13:27:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308280057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:22,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:27:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115923988] [2024-06-14 13:27:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:27:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:27:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:27:22,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:27:22,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:22,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:22,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:27:22,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:23,465 INFO L124 PetriNetUnfolderBase]: 1179/1896 cut-off events. [2024-06-14 13:27:23,465 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2024-06-14 13:27:23,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1896 events. 1179/1896 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9436 event pairs, 473 based on Foata normal form. 2/1894 useless extension candidates. Maximal degree in co-relation 5178. Up to 1739 conditions per place. [2024-06-14 13:27:23,473 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 51 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-14 13:27:23,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 389 flow [2024-06-14 13:27:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:27:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:27:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-14 13:27:23,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 13:27:23,476 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 99 transitions. [2024-06-14 13:27:23,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 389 flow [2024-06-14 13:27:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 362 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:23,481 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 232 flow [2024-06-14 13:27:23,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 13:27:23,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-14 13:27:23,483 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 232 flow [2024-06-14 13:27:23,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:23,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:23,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:23,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:27:23,484 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)] === [2024-06-14 13:27:23,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1000136268, now seen corresponding path program 1 times [2024-06-14 13:27:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761587666] [2024-06-14 13:27:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761587666] [2024-06-14 13:27:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761587666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:24,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:27:24,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520174738] [2024-06-14 13:27:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:27:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:24,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:27:24,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:27:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:27:24,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:24,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:24,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:27:24,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:25,668 INFO L124 PetriNetUnfolderBase]: 1169/1882 cut-off events. [2024-06-14 13:27:25,668 INFO L125 PetriNetUnfolderBase]: For 2853/2856 co-relation queries the response was YES. [2024-06-14 13:27:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1882 events. 1169/1882 cut-off events. For 2853/2856 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9327 event pairs, 467 based on Foata normal form. 6/1885 useless extension candidates. Maximal degree in co-relation 5656. Up to 1731 conditions per place. [2024-06-14 13:27:25,684 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:27:25,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 388 flow [2024-06-14 13:27:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:27:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:27:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 13:27:25,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 13:27:25,690 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 232 flow. Second operand 5 states and 97 transitions. [2024-06-14 13:27:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 388 flow [2024-06-14 13:27:25,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 13:27:25,697 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 246 flow [2024-06-14 13:27:25,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-14 13:27:25,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 13:27:25,700 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 246 flow [2024-06-14 13:27:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:25,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:25,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:27:25,701 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)] === [2024-06-14 13:27:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -947596773, now seen corresponding path program 1 times [2024-06-14 13:27:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972736981] [2024-06-14 13:27:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:27,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:27,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972736981] [2024-06-14 13:27:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972736981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:27,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:27,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:27:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350112104] [2024-06-14 13:27:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:27,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:27:27,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:27:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:27:27,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:27,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:27:27,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:27,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:27,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:28,607 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-14 13:27:28,608 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-14 13:27:28,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 2123 events. 1389/2123 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10087 event pairs, 523 based on Foata normal form. 2/2120 useless extension candidates. Maximal degree in co-relation 6746. Up to 1956 conditions per place. [2024-06-14 13:27:28,621 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-14 13:27:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 530 flow [2024-06-14 13:27:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:27:28,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 13:27:28,623 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 246 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:27:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 530 flow [2024-06-14 13:27:28,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 516 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:28,630 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 330 flow [2024-06-14 13:27:28,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-14 13:27:28,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 13:27:28,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 330 flow [2024-06-14 13:27:28,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:27:28,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:28,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:27:28,634 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)] === [2024-06-14 13:27:28,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -940209783, now seen corresponding path program 2 times [2024-06-14 13:27:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:28,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359305578] [2024-06-14 13:27:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:30,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359305578] [2024-06-14 13:27:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359305578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:30,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:30,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:27:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608282524] [2024-06-14 13:27:30,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:27:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:27:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:27:30,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:30,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:27:30,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:30,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:30,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:31,348 INFO L124 PetriNetUnfolderBase]: 1384/2109 cut-off events. [2024-06-14 13:27:31,348 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-14 13:27:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2109 events. 1384/2109 cut-off events. For 6466/6466 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10011 event pairs, 537 based on Foata normal form. 2/2102 useless extension candidates. Maximal degree in co-relation 7390. Up to 1953 conditions per place. [2024-06-14 13:27:31,359 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 21 changer transitions 0/82 dead transitions. [2024-06-14 13:27:31,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 586 flow [2024-06-14 13:27:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:27:31,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-14 13:27:31,361 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 330 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:27:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 586 flow [2024-06-14 13:27:31,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 556 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:31,366 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 378 flow [2024-06-14 13:27:31,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-06-14 13:27:31,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-14 13:27:31,367 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 378 flow [2024-06-14 13:27:31,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:27:31,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:31,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:31,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:27:31,368 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)] === [2024-06-14 13:27:31,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 189280819, now seen corresponding path program 1 times [2024-06-14 13:27:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:31,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363333437] [2024-06-14 13:27:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363333437] [2024-06-14 13:27:32,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363333437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:32,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:32,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:27:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260978388] [2024-06-14 13:27:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:32,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:27:32,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:27:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:27:32,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:32,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:32,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:32,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:32,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:33,663 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-14 13:27:33,663 INFO L125 PetriNetUnfolderBase]: For 8390/8392 co-relation queries the response was YES. [2024-06-14 13:27:33,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2249 events. 1471/2249 cut-off events. For 8390/8392 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10791 event pairs, 524 based on Foata normal form. 6/2250 useless extension candidates. Maximal degree in co-relation 8311. Up to 2020 conditions per place. [2024-06-14 13:27:33,675 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 73 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-14 13:27:33,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 866 flow [2024-06-14 13:27:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 13:27:33,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 13:27:33,677 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 378 flow. Second operand 7 states and 142 transitions. [2024-06-14 13:27:33,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 866 flow [2024-06-14 13:27:33,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 802 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:33,683 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 564 flow [2024-06-14 13:27:33,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=564, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:27:33,684 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 13:27:33,684 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 564 flow [2024-06-14 13:27:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:33,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:33,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:33,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:27:33,685 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)] === [2024-06-14 13:27:33,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash 880823299, now seen corresponding path program 2 times [2024-06-14 13:27:33,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:33,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133080633] [2024-06-14 13:27:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:33,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:35,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133080633] [2024-06-14 13:27:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133080633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:35,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:35,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:27:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050393177] [2024-06-14 13:27:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:27:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:27:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:27:35,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:35,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:35,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:35,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:35,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:36,297 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-14 13:27:36,297 INFO L125 PetriNetUnfolderBase]: For 10873/10877 co-relation queries the response was YES. [2024-06-14 13:27:36,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9060 conditions, 2327 events. 1515/2327 cut-off events. For 10873/10877 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11235 event pairs, 531 based on Foata normal form. 10/2332 useless extension candidates. Maximal degree in co-relation 9026. Up to 2058 conditions per place. [2024-06-14 13:27:36,307 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 65 selfloop transitions, 40 changer transitions 0/110 dead transitions. [2024-06-14 13:27:36,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 954 flow [2024-06-14 13:27:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 13:27:36,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:27:36,309 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 564 flow. Second operand 6 states and 120 transitions. [2024-06-14 13:27:36,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 954 flow [2024-06-14 13:27:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 904 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:36,318 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 681 flow [2024-06-14 13:27:36,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=681, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-14 13:27:36,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:27:36,318 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 681 flow [2024-06-14 13:27:36,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:36,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:36,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:27:36,319 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)] === [2024-06-14 13:27:36,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash 933470579, now seen corresponding path program 3 times [2024-06-14 13:27:36,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:36,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281998338] [2024-06-14 13:27:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:37,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281998338] [2024-06-14 13:27:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281998338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:37,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:37,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:27:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319815627] [2024-06-14 13:27:37,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:37,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:27:37,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:27:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:27:38,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:38,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:38,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:38,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:39,140 INFO L124 PetriNetUnfolderBase]: 1499/2299 cut-off events. [2024-06-14 13:27:39,140 INFO L125 PetriNetUnfolderBase]: For 12935/12953 co-relation queries the response was YES. [2024-06-14 13:27:39,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9167 conditions, 2299 events. 1499/2299 cut-off events. For 12935/12953 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11030 event pairs, 536 based on Foata normal form. 18/2305 useless extension candidates. Maximal degree in co-relation 9132. Up to 2045 conditions per place. [2024-06-14 13:27:39,151 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 39 changer transitions 0/104 dead transitions. [2024-06-14 13:27:39,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 945 flow [2024-06-14 13:27:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:27:39,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 13:27:39,153 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 681 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:27:39,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 945 flow [2024-06-14 13:27:39,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 870 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:39,161 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 695 flow [2024-06-14 13:27:39,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=695, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-14 13:27:39,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 13:27:39,162 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 695 flow [2024-06-14 13:27:39,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:39,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:39,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:27:39,163 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)] === [2024-06-14 13:27:39,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 918546559, now seen corresponding path program 1 times [2024-06-14 13:27:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:39,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785374255] [2024-06-14 13:27:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:39,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:41,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:41,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785374255] [2024-06-14 13:27:41,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785374255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:41,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:41,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347332059] [2024-06-14 13:27:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:41,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:27:41,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 695 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-14 13:27:41,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:41,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:27:41,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:42,603 INFO L124 PetriNetUnfolderBase]: 1284/2072 cut-off events. [2024-06-14 13:27:42,604 INFO L125 PetriNetUnfolderBase]: For 11216/11219 co-relation queries the response was YES. [2024-06-14 13:27:42,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2072 events. 1284/2072 cut-off events. For 11216/11219 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10364 event pairs, 435 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 8076. Up to 1878 conditions per place. [2024-06-14 13:27:42,613 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 87 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-14 13:27:42,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 969 flow [2024-06-14 13:27:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:27:42,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:27:42,626 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 695 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:27:42,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 969 flow [2024-06-14 13:27:42,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 800 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:27:42,636 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 579 flow [2024-06-14 13:27:42,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-14 13:27:42,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:27:42,637 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 579 flow [2024-06-14 13:27:42,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-14 13:27:42,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:42,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:42,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:27:42,637 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)] === [2024-06-14 13:27:42,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1261213570, now seen corresponding path program 1 times [2024-06-14 13:27:42,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:42,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042583414] [2024-06-14 13:27:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042583414] [2024-06-14 13:27:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042583414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:45,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:45,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:45,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313654561] [2024-06-14 13:27:45,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:45,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:45,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:45,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:45,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:45,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 579 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) [2024-06-14 13:27:45,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:45,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:45,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:46,177 INFO L124 PetriNetUnfolderBase]: 1540/2373 cut-off events. [2024-06-14 13:27:46,177 INFO L125 PetriNetUnfolderBase]: For 13309/13309 co-relation queries the response was YES. [2024-06-14 13:27:46,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9449 conditions, 2373 events. 1540/2373 cut-off events. For 13309/13309 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11472 event pairs, 525 based on Foata normal form. 2/2373 useless extension candidates. Maximal degree in co-relation 9415. Up to 2209 conditions per place. [2024-06-14 13:27:46,190 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 106 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-14 13:27:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 1033 flow [2024-06-14 13:27:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:27:46,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:27:46,202 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 579 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:27:46,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 1033 flow [2024-06-14 13:27:46,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 998 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:46,212 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 652 flow [2024-06-14 13:27:46,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-14 13:27:46,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-14 13:27:46,213 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 652 flow [2024-06-14 13:27:46,213 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) [2024-06-14 13:27:46,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:46,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:27:46,214 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)] === [2024-06-14 13:27:46,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1535713510, now seen corresponding path program 2 times [2024-06-14 13:27:46,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:46,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027640307] [2024-06-14 13:27:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:46,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:48,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:48,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027640307] [2024-06-14 13:27:48,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027640307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:48,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:48,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694753132] [2024-06-14 13:27:48,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:48,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:48,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:48,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:48,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 652 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) [2024-06-14 13:27:48,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:48,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:49,701 INFO L124 PetriNetUnfolderBase]: 1553/2406 cut-off events. [2024-06-14 13:27:49,702 INFO L125 PetriNetUnfolderBase]: For 16539/16539 co-relation queries the response was YES. [2024-06-14 13:27:49,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10179 conditions, 2406 events. 1553/2406 cut-off events. For 16539/16539 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11823 event pairs, 485 based on Foata normal form. 2/2403 useless extension candidates. Maximal degree in co-relation 10143. Up to 1935 conditions per place. [2024-06-14 13:27:49,731 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 45 changer transitions 0/130 dead transitions. [2024-06-14 13:27:49,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1112 flow [2024-06-14 13:27:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:27:49,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 13:27:49,747 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 652 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:27:49,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1112 flow [2024-06-14 13:27:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1053 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:49,766 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 793 flow [2024-06-14 13:27:49,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=793, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-14 13:27:49,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-14 13:27:49,767 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 793 flow [2024-06-14 13:27:49,768 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) [2024-06-14 13:27:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:49,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:27:49,768 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)] === [2024-06-14 13:27:49,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1598414456, now seen corresponding path program 3 times [2024-06-14 13:27:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:49,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127496503] [2024-06-14 13:27:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127496503] [2024-06-14 13:27:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127496503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250492121] [2024-06-14 13:27:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:52,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:52,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 793 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) [2024-06-14 13:27:52,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:52,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:52,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:53,377 INFO L124 PetriNetUnfolderBase]: 1548/2375 cut-off events. [2024-06-14 13:27:53,377 INFO L125 PetriNetUnfolderBase]: For 20150/20150 co-relation queries the response was YES. [2024-06-14 13:27:53,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 2375 events. 1548/2375 cut-off events. For 20150/20150 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11591 event pairs, 536 based on Foata normal form. 2/2353 useless extension candidates. Maximal degree in co-relation 10904. Up to 1932 conditions per place. [2024-06-14 13:27:53,388 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 72 selfloop transitions, 50 changer transitions 0/127 dead transitions. [2024-06-14 13:27:53,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1207 flow [2024-06-14 13:27:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:27:53,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:27:53,390 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 793 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:27:53,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1207 flow [2024-06-14 13:27:53,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1146 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:53,403 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 883 flow [2024-06-14 13:27:53,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-14 13:27:53,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 13:27:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 883 flow [2024-06-14 13:27:53,404 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) [2024-06-14 13:27:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:53,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:27:53,405 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2039372873, now seen corresponding path program 1 times [2024-06-14 13:27:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874881225] [2024-06-14 13:27:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874881225] [2024-06-14 13:27:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874881225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:55,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:27:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127769281] [2024-06-14 13:27:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:55,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:27:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:27:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:27:55,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:27:55,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:55,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:55,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:27:55,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:56,123 INFO L124 PetriNetUnfolderBase]: 1335/2159 cut-off events. [2024-06-14 13:27:56,123 INFO L125 PetriNetUnfolderBase]: For 18334/18334 co-relation queries the response was YES. [2024-06-14 13:27:56,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9852 conditions, 2159 events. 1335/2159 cut-off events. For 18334/18334 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10906 event pairs, 437 based on Foata normal form. 2/2159 useless extension candidates. Maximal degree in co-relation 9813. Up to 2002 conditions per place. [2024-06-14 13:27:56,135 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 99 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-14 13:27:56,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 113 transitions, 1145 flow [2024-06-14 13:27:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:27:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:27:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:27:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-14 13:27:56,136 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 883 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:27:56,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 113 transitions, 1145 flow [2024-06-14 13:27:56,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 1059 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:56,151 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 843 flow [2024-06-14 13:27:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-14 13:27:56,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-14 13:27:56,152 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 843 flow [2024-06-14 13:27:56,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:56,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:56,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:27:56,153 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)] === [2024-06-14 13:27:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 214870884, now seen corresponding path program 1 times [2024-06-14 13:27:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91759119] [2024-06-14 13:27:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91759119] [2024-06-14 13:27:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91759119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:58,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:58,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224720695] [2024-06-14 13:27:58,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:58,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:58,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:58,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:27:58,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:27:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:27:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:59,101 INFO L124 PetriNetUnfolderBase]: 1529/2359 cut-off events. [2024-06-14 13:27:59,101 INFO L125 PetriNetUnfolderBase]: For 23305/23305 co-relation queries the response was YES. [2024-06-14 13:27:59,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11072 conditions, 2359 events. 1529/2359 cut-off events. For 23305/23305 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11509 event pairs, 514 based on Foata normal form. 4/2361 useless extension candidates. Maximal degree in co-relation 11031. Up to 2201 conditions per place. [2024-06-14 13:27:59,113 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 19 changer transitions 0/140 dead transitions. [2024-06-14 13:27:59,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1223 flow [2024-06-14 13:27:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:27:59,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:27:59,115 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 843 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:27:59,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1223 flow [2024-06-14 13:27:59,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1189 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:59,135 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 855 flow [2024-06-14 13:27:59,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-14 13:27:59,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 13:27:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 855 flow [2024-06-14 13:27:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:27:59,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:59,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:59,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:27:59,136 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)] === [2024-06-14 13:27:59,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1382027646, now seen corresponding path program 2 times [2024-06-14 13:27:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706174897] [2024-06-14 13:27:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706174897] [2024-06-14 13:28:01,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706174897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:01,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:01,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451314419] [2024-06-14 13:28:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:01,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:01,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:01,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:01,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 855 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) [2024-06-14 13:28:01,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:01,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:01,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:03,134 INFO L124 PetriNetUnfolderBase]: 1555/2411 cut-off events. [2024-06-14 13:28:03,135 INFO L125 PetriNetUnfolderBase]: For 26122/26122 co-relation queries the response was YES. [2024-06-14 13:28:03,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11486 conditions, 2411 events. 1555/2411 cut-off events. For 26122/26122 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11845 event pairs, 481 based on Foata normal form. 4/2410 useless extension candidates. Maximal degree in co-relation 11444. Up to 1934 conditions per place. [2024-06-14 13:28:03,148 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 50 changer transitions 0/144 dead transitions. [2024-06-14 13:28:03,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 144 transitions, 1339 flow [2024-06-14 13:28:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:28:03,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:28:03,150 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 855 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:28:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 144 transitions, 1339 flow [2024-06-14 13:28:03,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1301 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:03,168 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 963 flow [2024-06-14 13:28:03,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-14 13:28:03,168 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-14 13:28:03,168 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 963 flow [2024-06-14 13:28:03,169 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) [2024-06-14 13:28:03,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:03,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:03,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:28:03,169 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)] === [2024-06-14 13:28:03,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash 362687874, now seen corresponding path program 3 times [2024-06-14 13:28:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:03,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255975549] [2024-06-14 13:28:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:05,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:05,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255975549] [2024-06-14 13:28:05,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255975549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:05,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:05,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943573680] [2024-06-14 13:28:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:05,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 963 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:28:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:05,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:05,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:06,833 INFO L124 PetriNetUnfolderBase]: 1617/2514 cut-off events. [2024-06-14 13:28:06,833 INFO L125 PetriNetUnfolderBase]: For 30846/30850 co-relation queries the response was YES. [2024-06-14 13:28:06,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 2514 events. 1617/2514 cut-off events. For 30846/30850 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12513 event pairs, 472 based on Foata normal form. 8/2517 useless extension candidates. Maximal degree in co-relation 12370. Up to 1986 conditions per place. [2024-06-14 13:28:06,855 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 58 changer transitions 0/148 dead transitions. [2024-06-14 13:28:06,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 148 transitions, 1563 flow [2024-06-14 13:28:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 13:28:06,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 13:28:06,875 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 963 flow. Second operand 7 states and 141 transitions. [2024-06-14 13:28:06,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 148 transitions, 1563 flow [2024-06-14 13:28:06,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1431 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:06,902 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 1045 flow [2024-06-14 13:28:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1045, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-14 13:28:06,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 13:28:06,903 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 1045 flow [2024-06-14 13:28:06,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:28:06,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:06,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:28:06,904 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)] === [2024-06-14 13:28:06,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 362695810, now seen corresponding path program 1 times [2024-06-14 13:28:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525240949] [2024-06-14 13:28:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:09,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525240949] [2024-06-14 13:28:09,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525240949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:09,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:09,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:09,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040903042] [2024-06-14 13:28:09,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:09,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:09,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:09,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:09,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 1045 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:09,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:09,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:09,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:10,671 INFO L124 PetriNetUnfolderBase]: 1637/2546 cut-off events. [2024-06-14 13:28:10,671 INFO L125 PetriNetUnfolderBase]: For 33888/33892 co-relation queries the response was YES. [2024-06-14 13:28:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12687 conditions, 2546 events. 1637/2546 cut-off events. For 33888/33892 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12666 event pairs, 483 based on Foata normal form. 8/2549 useless extension candidates. Maximal degree in co-relation 12643. Up to 2218 conditions per place. [2024-06-14 13:28:10,686 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-14 13:28:10,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 145 transitions, 1435 flow [2024-06-14 13:28:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:28:10,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:28:10,689 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 1045 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:28:10,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 145 transitions, 1435 flow [2024-06-14 13:28:10,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 1359 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:10,713 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1086 flow [2024-06-14 13:28:10,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-14 13:28:10,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-14 13:28:10,714 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1086 flow [2024-06-14 13:28:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:10,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:10,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:28:10,714 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:10,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2049498050, now seen corresponding path program 4 times [2024-06-14 13:28:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851558403] [2024-06-14 13:28:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:13,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851558403] [2024-06-14 13:28:13,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851558403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413021298] [2024-06-14 13:28:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:13,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:13,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:28:13,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:13,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:13,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:14,380 INFO L124 PetriNetUnfolderBase]: 1627/2516 cut-off events. [2024-06-14 13:28:14,381 INFO L125 PetriNetUnfolderBase]: For 37321/37333 co-relation queries the response was YES. [2024-06-14 13:28:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12811 conditions, 2516 events. 1627/2516 cut-off events. For 37321/37333 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12508 event pairs, 505 based on Foata normal form. 12/2510 useless extension candidates. Maximal degree in co-relation 12766. Up to 2010 conditions per place. [2024-06-14 13:28:14,394 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 82 selfloop transitions, 56 changer transitions 0/143 dead transitions. [2024-06-14 13:28:14,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1518 flow [2024-06-14 13:28:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:28:14,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:28:14,401 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1086 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:28:14,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1518 flow [2024-06-14 13:28:14,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1417 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:14,431 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1106 flow [2024-06-14 13:28:14,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 13:28:14,431 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 13:28:14,432 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1106 flow [2024-06-14 13:28:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:28:14,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:14,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:28:14,432 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)] === [2024-06-14 13:28:14,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1988761346, now seen corresponding path program 5 times [2024-06-14 13:28:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728915908] [2024-06-14 13:28:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:17,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:17,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728915908] [2024-06-14 13:28:17,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728915908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:17,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691364772] [2024-06-14 13:28:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:17,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:17,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1106 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) [2024-06-14 13:28:17,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:17,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:17,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:18,706 INFO L124 PetriNetUnfolderBase]: 1617/2497 cut-off events. [2024-06-14 13:28:18,706 INFO L125 PetriNetUnfolderBase]: For 40138/40138 co-relation queries the response was YES. [2024-06-14 13:28:18,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12896 conditions, 2497 events. 1617/2497 cut-off events. For 40138/40138 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12396 event pairs, 560 based on Foata normal form. 4/2475 useless extension candidates. Maximal degree in co-relation 12850. Up to 2002 conditions per place. [2024-06-14 13:28:18,721 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 59 changer transitions 0/145 dead transitions. [2024-06-14 13:28:18,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 145 transitions, 1480 flow [2024-06-14 13:28:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:28:18,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:28:18,723 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1106 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:28:18,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 145 transitions, 1480 flow [2024-06-14 13:28:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1276 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:18,751 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 1028 flow [2024-06-14 13:28:18,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 13:28:18,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 13:28:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 1028 flow [2024-06-14 13:28:18,751 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) [2024-06-14 13:28:18,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:18,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:28:18,752 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)] === [2024-06-14 13:28:18,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -722333634, now seen corresponding path program 2 times [2024-06-14 13:28:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222079729] [2024-06-14 13:28:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222079729] [2024-06-14 13:28:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222079729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:21,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976494004] [2024-06-14 13:28:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:21,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:21,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:21,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:21,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:21,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:22,854 INFO L124 PetriNetUnfolderBase]: 1637/2556 cut-off events. [2024-06-14 13:28:22,854 INFO L125 PetriNetUnfolderBase]: For 42041/42053 co-relation queries the response was YES. [2024-06-14 13:28:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13130 conditions, 2556 events. 1637/2556 cut-off events. For 42041/42053 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12805 event pairs, 494 based on Foata normal form. 12/2556 useless extension candidates. Maximal degree in co-relation 13084. Up to 2228 conditions per place. [2024-06-14 13:28:22,868 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 97 selfloop transitions, 41 changer transitions 0/143 dead transitions. [2024-06-14 13:28:22,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1410 flow [2024-06-14 13:28:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:28:22,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:28:22,870 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 1028 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:28:22,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1410 flow [2024-06-14 13:28:22,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1177 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:28:22,897 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 913 flow [2024-06-14 13:28:22,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-06-14 13:28:22,897 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 13:28:22,897 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 913 flow [2024-06-14 13:28:22,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:22,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:22,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:28:22,898 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)] === [2024-06-14 13:28:22,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2039966914, now seen corresponding path program 3 times [2024-06-14 13:28:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:22,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182269161] [2024-06-14 13:28:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:22,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:25,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182269161] [2024-06-14 13:28:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182269161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:25,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:25,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825892220] [2024-06-14 13:28:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:25,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:25,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:25,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:25,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:25,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:25,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:26,698 INFO L124 PetriNetUnfolderBase]: 1629/2544 cut-off events. [2024-06-14 13:28:26,698 INFO L125 PetriNetUnfolderBase]: For 44076/44088 co-relation queries the response was YES. [2024-06-14 13:28:26,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12901 conditions, 2544 events. 1629/2544 cut-off events. For 44076/44088 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12765 event pairs, 466 based on Foata normal form. 12/2544 useless extension candidates. Maximal degree in co-relation 12857. Up to 2134 conditions per place. [2024-06-14 13:28:26,710 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 46 changer transitions 0/145 dead transitions. [2024-06-14 13:28:26,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 1301 flow [2024-06-14 13:28:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:28:26,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:28:26,712 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 913 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:28:26,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 1301 flow [2024-06-14 13:28:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 145 transitions, 1203 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:26,746 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 946 flow [2024-06-14 13:28:26,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=946, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2024-06-14 13:28:26,747 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 13:28:26,747 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 946 flow [2024-06-14 13:28:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:28:26,749 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)] === [2024-06-14 13:28:26,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash -750841785, now seen corresponding path program 1 times [2024-06-14 13:28:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:26,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878084157] [2024-06-14 13:28:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:29,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878084157] [2024-06-14 13:28:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878084157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:29,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:29,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661959248] [2024-06-14 13:28:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:29,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:29,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:29,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 946 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) [2024-06-14 13:28:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:30,650 INFO L124 PetriNetUnfolderBase]: 1801/2821 cut-off events. [2024-06-14 13:28:30,651 INFO L125 PetriNetUnfolderBase]: For 56537/56537 co-relation queries the response was YES. [2024-06-14 13:28:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14952 conditions, 2821 events. 1801/2821 cut-off events. For 56537/56537 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14535 event pairs, 422 based on Foata normal form. 4/2823 useless extension candidates. Maximal degree in co-relation 14907. Up to 2319 conditions per place. [2024-06-14 13:28:30,666 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2024-06-14 13:28:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1586 flow [2024-06-14 13:28:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:28:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 13:28:30,669 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 946 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:28:30,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1586 flow [2024-06-14 13:28:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 1473 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:30,705 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 948 flow [2024-06-14 13:28:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-14 13:28:30,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 13:28:30,705 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 948 flow [2024-06-14 13:28:30,705 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) [2024-06-14 13:28:30,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:30,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:28:30,706 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)] === [2024-06-14 13:28:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1818712313, now seen corresponding path program 2 times [2024-06-14 13:28:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:30,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254959717] [2024-06-14 13:28:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254959717] [2024-06-14 13:28:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254959717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:33,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:33,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783050662] [2024-06-14 13:28:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:33,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:33,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:33,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 948 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) [2024-06-14 13:28:33,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:33,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:33,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:34,464 INFO L124 PetriNetUnfolderBase]: 1793/2809 cut-off events. [2024-06-14 13:28:34,464 INFO L125 PetriNetUnfolderBase]: For 59762/59762 co-relation queries the response was YES. [2024-06-14 13:28:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14995 conditions, 2809 events. 1793/2809 cut-off events. For 59762/59762 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14540 event pairs, 536 based on Foata normal form. 4/2811 useless extension candidates. Maximal degree in co-relation 14949. Up to 2599 conditions per place. [2024-06-14 13:28:34,479 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2024-06-14 13:28:34,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 166 transitions, 1436 flow [2024-06-14 13:28:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:28:34,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:28:34,480 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 948 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:28:34,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 166 transitions, 1436 flow [2024-06-14 13:28:34,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1373 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:34,528 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 978 flow [2024-06-14 13:28:34,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=978, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-14 13:28:34,528 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-14 13:28:34,528 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 978 flow [2024-06-14 13:28:34,529 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) [2024-06-14 13:28:34,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:34,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:28:34,529 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)] === [2024-06-14 13:28:34,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1813649017, now seen corresponding path program 3 times [2024-06-14 13:28:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391810864] [2024-06-14 13:28:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:37,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391810864] [2024-06-14 13:28:37,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391810864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808140619] [2024-06-14 13:28:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 978 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) [2024-06-14 13:28:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:37,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:37,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:38,507 INFO L124 PetriNetUnfolderBase]: 1813/2837 cut-off events. [2024-06-14 13:28:38,507 INFO L125 PetriNetUnfolderBase]: For 65111/65111 co-relation queries the response was YES. [2024-06-14 13:28:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15439 conditions, 2837 events. 1813/2837 cut-off events. For 65111/65111 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14607 event pairs, 475 based on Foata normal form. 4/2836 useless extension candidates. Maximal degree in co-relation 15391. Up to 2300 conditions per place. [2024-06-14 13:28:38,523 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 58 changer transitions 0/161 dead transitions. [2024-06-14 13:28:38,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 161 transitions, 1438 flow [2024-06-14 13:28:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:28:38,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:28:38,532 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 978 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:28:38,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 161 transitions, 1438 flow [2024-06-14 13:28:38,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 161 transitions, 1369 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:38,587 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 1078 flow [2024-06-14 13:28:38,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1078, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-14 13:28:38,588 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-14 13:28:38,588 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 1078 flow [2024-06-14 13:28:38,588 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) [2024-06-14 13:28:38,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:38,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:28:38,589 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:38,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 682699670, now seen corresponding path program 1 times [2024-06-14 13:28:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721754719] [2024-06-14 13:28:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:40,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:40,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721754719] [2024-06-14 13:28:40,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721754719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:40,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:40,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:28:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777066900] [2024-06-14 13:28:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:28:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:28:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:28:40,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:40,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 1078 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:40,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:40,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:40,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:41,856 INFO L124 PetriNetUnfolderBase]: 1823/2859 cut-off events. [2024-06-14 13:28:41,856 INFO L125 PetriNetUnfolderBase]: For 69998/69998 co-relation queries the response was YES. [2024-06-14 13:28:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15922 conditions, 2859 events. 1823/2859 cut-off events. For 69998/69998 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14816 event pairs, 529 based on Foata normal form. 2/2859 useless extension candidates. Maximal degree in co-relation 15873. Up to 2678 conditions per place. [2024-06-14 13:28:41,875 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 132 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-06-14 13:28:41,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 156 transitions, 1558 flow [2024-06-14 13:28:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:28:41,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:28:41,876 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 1078 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:28:41,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 156 transitions, 1558 flow [2024-06-14 13:28:41,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 156 transitions, 1407 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:41,935 INFO L231 Difference]: Finished difference. Result has 111 places, 133 transitions, 1035 flow [2024-06-14 13:28:41,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1035, PETRI_PLACES=111, PETRI_TRANSITIONS=133} [2024-06-14 13:28:41,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 13:28:41,936 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 133 transitions, 1035 flow [2024-06-14 13:28:41,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:41,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:41,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:41,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:28:41,936 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)] === [2024-06-14 13:28:41,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1335636525, now seen corresponding path program 4 times [2024-06-14 13:28:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:41,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141976590] [2024-06-14 13:28:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141976590] [2024-06-14 13:28:44,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141976590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:44,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:44,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:44,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36940858] [2024-06-14 13:28:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:44,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:44,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:44,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:44,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 133 transitions, 1035 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) [2024-06-14 13:28:44,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:44,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:44,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:46,026 INFO L124 PetriNetUnfolderBase]: 1815/2830 cut-off events. [2024-06-14 13:28:46,026 INFO L125 PetriNetUnfolderBase]: For 73213/73213 co-relation queries the response was YES. [2024-06-14 13:28:46,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15823 conditions, 2830 events. 1815/2830 cut-off events. For 73213/73213 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14602 event pairs, 565 based on Foata normal form. 4/2806 useless extension candidates. Maximal degree in co-relation 15772. Up to 2302 conditions per place. [2024-06-14 13:28:46,044 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 101 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-06-14 13:28:46,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 167 transitions, 1499 flow [2024-06-14 13:28:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:28:46,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 13:28:46,046 INFO L175 Difference]: Start difference. First operand has 111 places, 133 transitions, 1035 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:28:46,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 167 transitions, 1499 flow [2024-06-14 13:28:46,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1485 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 13:28:46,109 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1200 flow [2024-06-14 13:28:46,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-14 13:28:46,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-14 13:28:46,110 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1200 flow [2024-06-14 13:28:46,110 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) [2024-06-14 13:28:46,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:46,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:46,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:28:46,111 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:46,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 695079830, now seen corresponding path program 2 times [2024-06-14 13:28:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:46,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073961831] [2024-06-14 13:28:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:46,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073961831] [2024-06-14 13:28:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073961831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:28:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872413093] [2024-06-14 13:28:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:28:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:28:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:28:48,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:48,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:48,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:49,473 INFO L124 PetriNetUnfolderBase]: 1809/2827 cut-off events. [2024-06-14 13:28:49,473 INFO L125 PetriNetUnfolderBase]: For 78241/78241 co-relation queries the response was YES. [2024-06-14 13:28:49,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16350 conditions, 2827 events. 1809/2827 cut-off events. For 78241/78241 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14610 event pairs, 541 based on Foata normal form. 2/2819 useless extension candidates. Maximal degree in co-relation 16296. Up to 2661 conditions per place. [2024-06-14 13:28:49,492 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 125 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-06-14 13:28:49,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 149 transitions, 1544 flow [2024-06-14 13:28:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:28:49,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-14 13:28:49,493 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1200 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:28:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 149 transitions, 1544 flow [2024-06-14 13:28:49,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1377 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:49,540 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1077 flow [2024-06-14 13:28:49,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1077, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-14 13:28:49,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-14 13:28:49,541 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1077 flow [2024-06-14 13:28:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:49,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:28:49,542 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:49,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash 689372854, now seen corresponding path program 1 times [2024-06-14 13:28:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:49,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225100071] [2024-06-14 13:28:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225100071] [2024-06-14 13:28:51,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225100071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:51,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:51,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:28:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968996847] [2024-06-14 13:28:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:28:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:28:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:28:51,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:28:51,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1077 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:51,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:51,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:28:51,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:52,945 INFO L124 PetriNetUnfolderBase]: 1691/2721 cut-off events. [2024-06-14 13:28:52,946 INFO L125 PetriNetUnfolderBase]: For 70844/70844 co-relation queries the response was YES. [2024-06-14 13:28:52,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15026 conditions, 2721 events. 1691/2721 cut-off events. For 70844/70844 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14510 event pairs, 448 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 14971. Up to 2444 conditions per place. [2024-06-14 13:28:52,960 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 133 selfloop transitions, 23 changer transitions 0/165 dead transitions. [2024-06-14 13:28:52,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1647 flow [2024-06-14 13:28:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:28:52,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:28:52,961 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1077 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:28:52,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1647 flow [2024-06-14 13:28:52,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1606 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:53,000 INFO L231 Difference]: Finished difference. Result has 121 places, 144 transitions, 1204 flow [2024-06-14 13:28:53,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1204, PETRI_PLACES=121, PETRI_TRANSITIONS=144} [2024-06-14 13:28:53,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 13:28:53,000 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 144 transitions, 1204 flow [2024-06-14 13:28:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:53,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:53,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:53,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:28:53,001 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:53,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1353765784, now seen corresponding path program 2 times [2024-06-14 13:28:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:53,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111088226] [2024-06-14 13:28:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:53,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111088226] [2024-06-14 13:28:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111088226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:28:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950501546] [2024-06-14 13:28:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:28:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:28:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:28:55,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:28:55,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 144 transitions, 1204 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:55,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:55,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:28:55,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:56,079 INFO L124 PetriNetUnfolderBase]: 1715/2767 cut-off events. [2024-06-14 13:28:56,079 INFO L125 PetriNetUnfolderBase]: For 76251/76251 co-relation queries the response was YES. [2024-06-14 13:28:56,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 2767 events. 1715/2767 cut-off events. For 76251/76251 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14860 event pairs, 459 based on Foata normal form. 3/2763 useless extension candidates. Maximal degree in co-relation 15717. Up to 2534 conditions per place. [2024-06-14 13:28:56,094 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 139 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-14 13:28:56,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 164 transitions, 1643 flow [2024-06-14 13:28:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:28:56,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:28:56,095 INFO L175 Difference]: Start difference. First operand has 121 places, 144 transitions, 1204 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:28:56,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 164 transitions, 1643 flow [2024-06-14 13:28:56,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 1579 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-14 13:28:56,151 INFO L231 Difference]: Finished difference. Result has 128 places, 147 transitions, 1218 flow [2024-06-14 13:28:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1218, PETRI_PLACES=128, PETRI_TRANSITIONS=147} [2024-06-14 13:28:56,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-14 13:28:56,152 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 147 transitions, 1218 flow [2024-06-14 13:28:56,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:56,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:56,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:28:56,153 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)] === [2024-06-14 13:28:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1984233825, now seen corresponding path program 1 times [2024-06-14 13:28:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268199792] [2024-06-14 13:28:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268199792] [2024-06-14 13:28:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268199792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:58,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:58,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134055649] [2024-06-14 13:28:58,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:58,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:28:58,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 147 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:58,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:58,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:28:58,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:00,408 INFO L124 PetriNetUnfolderBase]: 1931/3030 cut-off events. [2024-06-14 13:29:00,409 INFO L125 PetriNetUnfolderBase]: For 100537/100537 co-relation queries the response was YES. [2024-06-14 13:29:00,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17671 conditions, 3030 events. 1931/3030 cut-off events. For 100537/100537 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15853 event pairs, 414 based on Foata normal form. 16/3044 useless extension candidates. Maximal degree in co-relation 17610. Up to 2434 conditions per place. [2024-06-14 13:29:00,429 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 172 selfloop transitions, 25 changer transitions 0/202 dead transitions. [2024-06-14 13:29:00,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 202 transitions, 1904 flow [2024-06-14 13:29:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:29:00,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:29:00,431 INFO L175 Difference]: Start difference. First operand has 128 places, 147 transitions, 1218 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:29:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 202 transitions, 1904 flow [2024-06-14 13:29:00,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 202 transitions, 1864 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:00,501 INFO L231 Difference]: Finished difference. Result has 132 places, 148 transitions, 1257 flow [2024-06-14 13:29:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1257, PETRI_PLACES=132, PETRI_TRANSITIONS=148} [2024-06-14 13:29:00,502 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-14 13:29:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 148 transitions, 1257 flow [2024-06-14 13:29:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:00,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:00,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:29:00,503 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)] === [2024-06-14 13:29:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 332546147, now seen corresponding path program 2 times [2024-06-14 13:29:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330222335] [2024-06-14 13:29:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330222335] [2024-06-14 13:29:03,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330222335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:03,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:03,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411220413] [2024-06-14 13:29:03,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:03,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:03,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:03,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:03,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 148 transitions, 1257 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:03,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:03,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:03,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:04,403 INFO L124 PetriNetUnfolderBase]: 1895/2974 cut-off events. [2024-06-14 13:29:04,404 INFO L125 PetriNetUnfolderBase]: For 98815/98815 co-relation queries the response was YES. [2024-06-14 13:29:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17128 conditions, 2974 events. 1895/2974 cut-off events. For 98815/98815 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15456 event pairs, 526 based on Foata normal form. 20/2992 useless extension candidates. Maximal degree in co-relation 17066. Up to 2636 conditions per place. [2024-06-14 13:29:04,424 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 171 selfloop transitions, 20 changer transitions 0/196 dead transitions. [2024-06-14 13:29:04,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 196 transitions, 1783 flow [2024-06-14 13:29:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:29:04,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 13:29:04,426 INFO L175 Difference]: Start difference. First operand has 132 places, 148 transitions, 1257 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:29:04,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 196 transitions, 1783 flow [2024-06-14 13:29:04,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 196 transitions, 1718 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:04,509 INFO L231 Difference]: Finished difference. Result has 135 places, 148 transitions, 1239 flow [2024-06-14 13:29:04,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1239, PETRI_PLACES=135, PETRI_TRANSITIONS=148} [2024-06-14 13:29:04,510 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-14 13:29:04,510 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 148 transitions, 1239 flow [2024-06-14 13:29:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:04,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:04,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:29:04,510 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)] === [2024-06-14 13:29:04,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 456813359, now seen corresponding path program 3 times [2024-06-14 13:29:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:04,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851502826] [2024-06-14 13:29:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851502826] [2024-06-14 13:29:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851502826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:07,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:07,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805649849] [2024-06-14 13:29:07,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:07,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:07,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 148 transitions, 1239 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:07,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:07,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:08,677 INFO L124 PetriNetUnfolderBase]: 1983/3137 cut-off events. [2024-06-14 13:29:08,677 INFO L125 PetriNetUnfolderBase]: For 106106/106110 co-relation queries the response was YES. [2024-06-14 13:29:08,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17746 conditions, 3137 events. 1983/3137 cut-off events. For 106106/106110 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16621 event pairs, 472 based on Foata normal form. 24/3156 useless extension candidates. Maximal degree in co-relation 17683. Up to 2453 conditions per place. [2024-06-14 13:29:08,693 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 128 selfloop transitions, 59 changer transitions 0/192 dead transitions. [2024-06-14 13:29:08,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 1769 flow [2024-06-14 13:29:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:29:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:29:08,695 INFO L175 Difference]: Start difference. First operand has 135 places, 148 transitions, 1239 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:29:08,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 1769 flow [2024-06-14 13:29:08,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 192 transitions, 1708 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:29:08,766 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1333 flow [2024-06-14 13:29:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-14 13:29:08,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 13:29:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1333 flow [2024-06-14 13:29:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:08,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:29:08,767 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)] === [2024-06-14 13:29:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 451450979, now seen corresponding path program 4 times [2024-06-14 13:29:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389662534] [2024-06-14 13:29:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:11,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389662534] [2024-06-14 13:29:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389662534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:11,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:11,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845963722] [2024-06-14 13:29:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:11,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:11,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:11,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:11,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1333 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:11,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:11,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:11,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:13,427 INFO L124 PetriNetUnfolderBase]: 2071/3278 cut-off events. [2024-06-14 13:29:13,427 INFO L125 PetriNetUnfolderBase]: For 115097/115097 co-relation queries the response was YES. [2024-06-14 13:29:13,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18734 conditions, 3278 events. 2071/3278 cut-off events. For 115097/115097 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17639 event pairs, 509 based on Foata normal form. 20/3293 useless extension candidates. Maximal degree in co-relation 18670. Up to 2601 conditions per place. [2024-06-14 13:29:13,449 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 57 changer transitions 0/197 dead transitions. [2024-06-14 13:29:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 197 transitions, 1887 flow [2024-06-14 13:29:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:29:13,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:29:13,451 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1333 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:29:13,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 197 transitions, 1887 flow [2024-06-14 13:29:13,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 197 transitions, 1750 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:13,527 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1349 flow [2024-06-14 13:29:13,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1349, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-14 13:29:13,527 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 13:29:13,527 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1349 flow [2024-06-14 13:29:13,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:13,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:13,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:13,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:29:13,528 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:13,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 876625297, now seen corresponding path program 5 times [2024-06-14 13:29:13,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:13,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363858760] [2024-06-14 13:29:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:16,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363858760] [2024-06-14 13:29:16,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363858760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:16,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:16,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402442455] [2024-06-14 13:29:16,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:16,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:16,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:16,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1349 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:16,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:16,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:16,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:17,692 INFO L124 PetriNetUnfolderBase]: 2139/3394 cut-off events. [2024-06-14 13:29:17,693 INFO L125 PetriNetUnfolderBase]: For 119501/119501 co-relation queries the response was YES. [2024-06-14 13:29:17,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19253 conditions, 3394 events. 2139/3394 cut-off events. For 119501/119501 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18455 event pairs, 493 based on Foata normal form. 16/3405 useless extension candidates. Maximal degree in co-relation 19188. Up to 2583 conditions per place. [2024-06-14 13:29:17,714 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 142 selfloop transitions, 60 changer transitions 0/207 dead transitions. [2024-06-14 13:29:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 207 transitions, 1951 flow [2024-06-14 13:29:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 13:29:17,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:29:17,732 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1349 flow. Second operand 10 states and 190 transitions. [2024-06-14 13:29:17,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 207 transitions, 1951 flow [2024-06-14 13:29:17,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 1816 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:17,844 INFO L231 Difference]: Finished difference. Result has 140 places, 151 transitions, 1374 flow [2024-06-14 13:29:17,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=140, PETRI_TRANSITIONS=151} [2024-06-14 13:29:17,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 13:29:17,845 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 151 transitions, 1374 flow [2024-06-14 13:29:17,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:17,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:17,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:29:17,846 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)] === [2024-06-14 13:29:17,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1083699469, now seen corresponding path program 1 times [2024-06-14 13:29:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103638648] [2024-06-14 13:29:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:17,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103638648] [2024-06-14 13:29:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103638648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:21,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:21,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944653442] [2024-06-14 13:29:21,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:21,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:21,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 151 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:21,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:21,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:21,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:22,718 INFO L124 PetriNetUnfolderBase]: 2311/3683 cut-off events. [2024-06-14 13:29:22,718 INFO L125 PetriNetUnfolderBase]: For 137552/137556 co-relation queries the response was YES. [2024-06-14 13:29:22,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21341 conditions, 3683 events. 2311/3683 cut-off events. For 137552/137556 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20590 event pairs, 550 based on Foata normal form. 16/3694 useless extension candidates. Maximal degree in co-relation 21275. Up to 2405 conditions per place. [2024-06-14 13:29:22,741 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 133 selfloop transitions, 62 changer transitions 0/200 dead transitions. [2024-06-14 13:29:22,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 2104 flow [2024-06-14 13:29:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:29:22,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 13:29:22,743 INFO L175 Difference]: Start difference. First operand has 140 places, 151 transitions, 1374 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:29:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 2104 flow [2024-06-14 13:29:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 200 transitions, 1956 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:22,872 INFO L231 Difference]: Finished difference. Result has 140 places, 153 transitions, 1426 flow [2024-06-14 13:29:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1426, PETRI_PLACES=140, PETRI_TRANSITIONS=153} [2024-06-14 13:29:22,873 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 13:29:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 153 transitions, 1426 flow [2024-06-14 13:29:22,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:22,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:29:22,874 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:22,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash -684765126, now seen corresponding path program 1 times [2024-06-14 13:29:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925320071] [2024-06-14 13:29:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925320071] [2024-06-14 13:29:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925320071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:25,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:25,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:29:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860214689] [2024-06-14 13:29:25,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:29:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:29:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:29:25,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:25,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 153 transitions, 1426 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:25,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:25,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:26,800 INFO L124 PetriNetUnfolderBase]: 2331/3714 cut-off events. [2024-06-14 13:29:26,801 INFO L125 PetriNetUnfolderBase]: For 139165/139165 co-relation queries the response was YES. [2024-06-14 13:29:26,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21531 conditions, 3714 events. 2331/3714 cut-off events. For 139165/139165 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20813 event pairs, 672 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 21464. Up to 3474 conditions per place. [2024-06-14 13:29:26,826 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 156 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-14 13:29:26,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 187 transitions, 2014 flow [2024-06-14 13:29:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:29:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-14 13:29:26,828 INFO L175 Difference]: Start difference. First operand has 140 places, 153 transitions, 1426 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:29:26,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 187 transitions, 2014 flow [2024-06-14 13:29:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 187 transitions, 1916 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:29:26,948 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1444 flow [2024-06-14 13:29:26,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-14 13:29:26,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-14 13:29:26,948 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1444 flow [2024-06-14 13:29:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:26,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:26,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:29:26,949 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)] === [2024-06-14 13:29:26,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1923751837, now seen corresponding path program 6 times [2024-06-14 13:29:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066412655] [2024-06-14 13:29:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:30,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:30,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066412655] [2024-06-14 13:29:30,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066412655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:30,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:30,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142646847] [2024-06-14 13:29:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:30,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:30,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:30,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:30,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:30,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:31,829 INFO L124 PetriNetUnfolderBase]: 2295/3644 cut-off events. [2024-06-14 13:29:31,829 INFO L125 PetriNetUnfolderBase]: For 140861/140861 co-relation queries the response was YES. [2024-06-14 13:29:31,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20842 conditions, 3644 events. 2295/3644 cut-off events. For 140861/140861 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20380 event pairs, 644 based on Foata normal form. 20/3638 useless extension candidates. Maximal degree in co-relation 20773. Up to 2977 conditions per place. [2024-06-14 13:29:31,853 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 136 selfloop transitions, 60 changer transitions 0/201 dead transitions. [2024-06-14 13:29:31,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 1966 flow [2024-06-14 13:29:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:29:31,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:29:31,855 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1444 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:29:31,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 1966 flow [2024-06-14 13:29:31,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 201 transitions, 1912 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:29:31,978 INFO L231 Difference]: Finished difference. Result has 149 places, 159 transitions, 1517 flow [2024-06-14 13:29:31,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=149, PETRI_TRANSITIONS=159} [2024-06-14 13:29:31,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-14 13:29:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 159 transitions, 1517 flow [2024-06-14 13:29:31,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:31,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:31,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:31,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:29:31,980 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)] === [2024-06-14 13:29:31,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1546537035, now seen corresponding path program 7 times [2024-06-14 13:29:31,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:31,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132244860] [2024-06-14 13:29:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:31,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:35,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:35,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132244860] [2024-06-14 13:29:35,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132244860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:35,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395772338] [2024-06-14 13:29:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:35,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:35,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 159 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:35,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:35,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:35,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:36,874 INFO L124 PetriNetUnfolderBase]: 2363/3756 cut-off events. [2024-06-14 13:29:36,875 INFO L125 PetriNetUnfolderBase]: For 146609/146609 co-relation queries the response was YES. [2024-06-14 13:29:36,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21672 conditions, 3756 events. 2363/3756 cut-off events. For 146609/146609 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21120 event pairs, 628 based on Foata normal form. 16/3746 useless extension candidates. Maximal degree in co-relation 21601. Up to 2959 conditions per place. [2024-06-14 13:29:36,900 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 143 selfloop transitions, 63 changer transitions 0/211 dead transitions. [2024-06-14 13:29:36,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2121 flow [2024-06-14 13:29:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:29:36,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 13:29:36,902 INFO L175 Difference]: Start difference. First operand has 149 places, 159 transitions, 1517 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:29:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2121 flow [2024-06-14 13:29:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 211 transitions, 1979 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:37,028 INFO L231 Difference]: Finished difference. Result has 151 places, 160 transitions, 1545 flow [2024-06-14 13:29:37,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1545, PETRI_PLACES=151, PETRI_TRANSITIONS=160} [2024-06-14 13:29:37,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-14 13:29:37,039 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 160 transitions, 1545 flow [2024-06-14 13:29:37,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:37,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:37,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:29:37,039 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)] === [2024-06-14 13:29:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1365159343, now seen corresponding path program 8 times [2024-06-14 13:29:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:37,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206865648] [2024-06-14 13:29:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:39,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206865648] [2024-06-14 13:29:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206865648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247689589] [2024-06-14 13:29:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:39,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:39,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 160 transitions, 1545 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:39,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:39,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:39,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:41,519 INFO L124 PetriNetUnfolderBase]: 2395/3833 cut-off events. [2024-06-14 13:29:41,519 INFO L125 PetriNetUnfolderBase]: For 152862/152874 co-relation queries the response was YES. [2024-06-14 13:29:41,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21820 conditions, 3833 events. 2395/3833 cut-off events. For 152862/152874 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21854 event pairs, 609 based on Foata normal form. 28/3843 useless extension candidates. Maximal degree in co-relation 21748. Up to 3153 conditions per place. [2024-06-14 13:29:41,547 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 137 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-14 13:29:41,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 199 transitions, 2089 flow [2024-06-14 13:29:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:29:41,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:29:41,569 INFO L175 Difference]: Start difference. First operand has 151 places, 160 transitions, 1545 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:29:41,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 199 transitions, 2089 flow [2024-06-14 13:29:41,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 199 transitions, 1931 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:41,712 INFO L231 Difference]: Finished difference. Result has 151 places, 161 transitions, 1548 flow [2024-06-14 13:29:41,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1548, PETRI_PLACES=151, PETRI_TRANSITIONS=161} [2024-06-14 13:29:41,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-14 13:29:41,713 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 161 transitions, 1548 flow [2024-06-14 13:29:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:41,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:41,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:29:41,713 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)] === [2024-06-14 13:29:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2079394827, now seen corresponding path program 2 times [2024-06-14 13:29:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639039892] [2024-06-14 13:29:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639039892] [2024-06-14 13:29:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639039892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:44,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:44,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954328738] [2024-06-14 13:29:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:44,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:44,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 161 transitions, 1548 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:44,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:44,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:44,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:46,214 INFO L124 PetriNetUnfolderBase]: 2443/3923 cut-off events. [2024-06-14 13:29:46,215 INFO L125 PetriNetUnfolderBase]: For 154415/154427 co-relation queries the response was YES. [2024-06-14 13:29:46,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22187 conditions, 3923 events. 2443/3923 cut-off events. For 154415/154427 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22652 event pairs, 609 based on Foata normal form. 20/3925 useless extension candidates. Maximal degree in co-relation 22114. Up to 3127 conditions per place. [2024-06-14 13:29:46,239 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 140 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-14 13:29:46,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 2118 flow [2024-06-14 13:29:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:29:46,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:29:46,241 INFO L175 Difference]: Start difference. First operand has 151 places, 161 transitions, 1548 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:29:46,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 2118 flow [2024-06-14 13:29:46,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 203 transitions, 1975 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:46,376 INFO L231 Difference]: Finished difference. Result has 153 places, 162 transitions, 1569 flow [2024-06-14 13:29:46,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=153, PETRI_TRANSITIONS=162} [2024-06-14 13:29:46,377 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-14 13:29:46,377 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 162 transitions, 1569 flow [2024-06-14 13:29:46,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:46,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:46,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:46,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:29:46,377 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:46,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1903062531, now seen corresponding path program 3 times [2024-06-14 13:29:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:46,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899239158] [2024-06-14 13:29:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:49,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:49,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899239158] [2024-06-14 13:29:49,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899239158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:49,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:49,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:49,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990658728] [2024-06-14 13:29:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:49,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:49,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:49,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 162 transitions, 1569 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:49,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:49,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:49,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:50,874 INFO L124 PetriNetUnfolderBase]: 2423/3891 cut-off events. [2024-06-14 13:29:50,874 INFO L125 PetriNetUnfolderBase]: For 149375/149387 co-relation queries the response was YES. [2024-06-14 13:29:50,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 3891 events. 2423/3891 cut-off events. For 149375/149387 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22345 event pairs, 560 based on Foata normal form. 20/3893 useless extension candidates. Maximal degree in co-relation 21354. Up to 2261 conditions per place. [2024-06-14 13:29:50,905 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 129 selfloop transitions, 67 changer transitions 0/201 dead transitions. [2024-06-14 13:29:50,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 201 transitions, 2017 flow [2024-06-14 13:29:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:29:50,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:29:50,907 INFO L175 Difference]: Start difference. First operand has 153 places, 162 transitions, 1569 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:29:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 201 transitions, 2017 flow [2024-06-14 13:29:51,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 1869 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:51,073 INFO L231 Difference]: Finished difference. Result has 154 places, 161 transitions, 1487 flow [2024-06-14 13:29:51,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1487, PETRI_PLACES=154, PETRI_TRANSITIONS=161} [2024-06-14 13:29:51,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 13:29:51,074 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 161 transitions, 1487 flow [2024-06-14 13:29:51,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:51,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:51,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:29:51,074 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:51,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1648081534, now seen corresponding path program 2 times [2024-06-14 13:29:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:51,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048173871] [2024-06-14 13:29:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:53,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048173871] [2024-06-14 13:29:53,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048173871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:53,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:53,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:29:53,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620279723] [2024-06-14 13:29:53,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:53,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:29:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:29:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:29:53,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:53,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 161 transitions, 1487 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:53,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:53,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:53,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:55,281 INFO L124 PetriNetUnfolderBase]: 2443/3940 cut-off events. [2024-06-14 13:29:55,281 INFO L125 PetriNetUnfolderBase]: For 148386/148386 co-relation queries the response was YES. [2024-06-14 13:29:55,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21678 conditions, 3940 events. 2443/3940 cut-off events. For 148386/148386 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22766 event pairs, 695 based on Foata normal form. 4/3934 useless extension candidates. Maximal degree in co-relation 21603. Up to 3662 conditions per place. [2024-06-14 13:29:55,312 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 150 selfloop transitions, 29 changer transitions 0/184 dead transitions. [2024-06-14 13:29:55,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 184 transitions, 2035 flow [2024-06-14 13:29:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:29:55,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:29:55,313 INFO L175 Difference]: Start difference. First operand has 154 places, 161 transitions, 1487 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:29:55,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 184 transitions, 2035 flow [2024-06-14 13:29:55,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 184 transitions, 1814 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:55,448 INFO L231 Difference]: Finished difference. Result has 153 places, 164 transitions, 1360 flow [2024-06-14 13:29:55,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=153, PETRI_TRANSITIONS=164} [2024-06-14 13:29:55,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-14 13:29:55,449 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 164 transitions, 1360 flow [2024-06-14 13:29:55,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:55,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:55,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:29:55,449 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:55,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash 73086226, now seen corresponding path program 3 times [2024-06-14 13:29:55,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89073769] [2024-06-14 13:29:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:55,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:57,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89073769] [2024-06-14 13:29:57,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89073769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:57,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:57,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:29:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435888848] [2024-06-14 13:29:57,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:57,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:29:57,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:29:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:29:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:29:58,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 164 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:58,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:58,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:29:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:59,228 INFO L124 PetriNetUnfolderBase]: 2431/3927 cut-off events. [2024-06-14 13:29:59,229 INFO L125 PetriNetUnfolderBase]: For 147984/147984 co-relation queries the response was YES. [2024-06-14 13:29:59,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20766 conditions, 3927 events. 2431/3927 cut-off events. For 147984/147984 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22677 event pairs, 682 based on Foata normal form. 4/3929 useless extension candidates. Maximal degree in co-relation 20692. Up to 3755 conditions per place. [2024-06-14 13:29:59,255 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 160 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-06-14 13:29:59,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 179 transitions, 1754 flow [2024-06-14 13:29:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:29:59,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:29:59,257 INFO L175 Difference]: Start difference. First operand has 153 places, 164 transitions, 1360 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:29:59,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 179 transitions, 1754 flow [2024-06-14 13:29:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 179 transitions, 1657 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:59,387 INFO L231 Difference]: Finished difference. Result has 155 places, 164 transitions, 1297 flow [2024-06-14 13:29:59,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=155, PETRI_TRANSITIONS=164} [2024-06-14 13:29:59,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-14 13:29:59,389 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 164 transitions, 1297 flow [2024-06-14 13:29:59,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:59,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:59,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:29:59,390 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:59,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -104395656, now seen corresponding path program 1 times [2024-06-14 13:29:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:59,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670334596] [2024-06-14 13:29:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:59,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670334596] [2024-06-14 13:30:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670334596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:01,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623355864] [2024-06-14 13:30:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:01,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:30:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 164 transitions, 1297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-14 13:30:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:01,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:30:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:02,684 INFO L124 PetriNetUnfolderBase]: 2275/3746 cut-off events. [2024-06-14 13:30:02,684 INFO L125 PetriNetUnfolderBase]: For 126032/126036 co-relation queries the response was YES. [2024-06-14 13:30:02,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 3746 events. 2275/3746 cut-off events. For 126032/126036 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22195 event pairs, 573 based on Foata normal form. 7/3739 useless extension candidates. Maximal degree in co-relation 18672. Up to 3425 conditions per place. [2024-06-14 13:30:02,711 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 153 selfloop transitions, 26 changer transitions 0/188 dead transitions. [2024-06-14 13:30:02,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 188 transitions, 1830 flow [2024-06-14 13:30:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 13:30:02,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-14 13:30:02,713 INFO L175 Difference]: Start difference. First operand has 155 places, 164 transitions, 1297 flow. Second operand 6 states and 115 transitions. [2024-06-14 13:30:02,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 188 transitions, 1830 flow [2024-06-14 13:30:02,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 188 transitions, 1770 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:02,829 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1328 flow [2024-06-14 13:30:02,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1328, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-14 13:30:02,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-14 13:30:02,830 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1328 flow [2024-06-14 13:30:02,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-14 13:30:02,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:02,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:02,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:30:02,830 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:02,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1478919018, now seen corresponding path program 2 times [2024-06-14 13:30:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960031334] [2024-06-14 13:30:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:02,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:05,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:05,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960031334] [2024-06-14 13:30:05,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960031334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:05,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:05,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:05,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421753477] [2024-06-14 13:30:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:05,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:05,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:30:05,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1328 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) [2024-06-14 13:30:05,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:05,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:30:05,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:06,556 INFO L124 PetriNetUnfolderBase]: 2295/3780 cut-off events. [2024-06-14 13:30:06,556 INFO L125 PetriNetUnfolderBase]: For 129453/129454 co-relation queries the response was YES. [2024-06-14 13:30:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18949 conditions, 3780 events. 2295/3780 cut-off events. For 129453/129454 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22428 event pairs, 595 based on Foata normal form. 5/3769 useless extension candidates. Maximal degree in co-relation 18875. Up to 3455 conditions per place. [2024-06-14 13:30:06,585 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 29 changer transitions 0/190 dead transitions. [2024-06-14 13:30:06,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 190 transitions, 1838 flow [2024-06-14 13:30:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:30:06,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-14 13:30:06,586 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1328 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:30:06,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 190 transitions, 1838 flow [2024-06-14 13:30:06,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 190 transitions, 1762 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:06,712 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1316 flow [2024-06-14 13:30:06,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1316, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-14 13:30:06,713 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-14 13:30:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1316 flow [2024-06-14 13:30:06,713 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) [2024-06-14 13:30:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:06,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:06,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:30:06,714 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:06,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash -982931336, now seen corresponding path program 3 times [2024-06-14 13:30:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:06,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332168119] [2024-06-14 13:30:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:08,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332168119] [2024-06-14 13:30:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332168119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:08,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:08,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:08,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547869475] [2024-06-14 13:30:08,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:08,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:08,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:30:08,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1316 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-14 13:30:08,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:08,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:30:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:09,978 INFO L124 PetriNetUnfolderBase]: 2262/3738 cut-off events. [2024-06-14 13:30:09,978 INFO L125 PetriNetUnfolderBase]: For 130092/130093 co-relation queries the response was YES. [2024-06-14 13:30:09,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18567 conditions, 3738 events. 2262/3738 cut-off events. For 130092/130093 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22179 event pairs, 600 based on Foata normal form. 7/3736 useless extension candidates. Maximal degree in co-relation 18493. Up to 3488 conditions per place. [2024-06-14 13:30:10,003 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 158 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-14 13:30:10,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 183 transitions, 1704 flow [2024-06-14 13:30:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:30:10,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:30:10,006 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1316 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:30:10,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 183 transitions, 1704 flow [2024-06-14 13:30:10,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 1592 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:30:10,116 INFO L231 Difference]: Finished difference. Result has 154 places, 167 transitions, 1242 flow [2024-06-14 13:30:10,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1242, PETRI_PLACES=154, PETRI_TRANSITIONS=167} [2024-06-14 13:30:10,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 13:30:10,117 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 167 transitions, 1242 flow [2024-06-14 13:30:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-14 13:30:10,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:10,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:10,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:30:10,118 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:10,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 73102098, now seen corresponding path program 1 times [2024-06-14 13:30:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420600541] [2024-06-14 13:30:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:10,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420600541] [2024-06-14 13:30:13,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420600541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:13,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:13,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978118125] [2024-06-14 13:30:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:13,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:13,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:13,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 167 transitions, 1242 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:13,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:13,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:13,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:14,542 INFO L124 PetriNetUnfolderBase]: 2420/3914 cut-off events. [2024-06-14 13:30:14,543 INFO L125 PetriNetUnfolderBase]: For 155790/155790 co-relation queries the response was YES. [2024-06-14 13:30:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20153 conditions, 3914 events. 2420/3914 cut-off events. For 155790/155790 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22560 event pairs, 677 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 20081. Up to 3752 conditions per place. [2024-06-14 13:30:14,571 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 165 selfloop transitions, 13 changer transitions 0/183 dead transitions. [2024-06-14 13:30:14,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 183 transitions, 1658 flow [2024-06-14 13:30:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:30:14,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:30:14,573 INFO L175 Difference]: Start difference. First operand has 154 places, 167 transitions, 1242 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:30:14,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 183 transitions, 1658 flow [2024-06-14 13:30:14,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 183 transitions, 1626 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:14,795 INFO L231 Difference]: Finished difference. Result has 155 places, 169 transitions, 1269 flow [2024-06-14 13:30:14,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1269, PETRI_PLACES=155, PETRI_TRANSITIONS=169} [2024-06-14 13:30:14,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-14 13:30:14,796 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 169 transitions, 1269 flow [2024-06-14 13:30:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:14,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:14,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:30:14,797 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)] === [2024-06-14 13:30:14,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash 241398255, now seen corresponding path program 1 times [2024-06-14 13:30:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:14,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753478221] [2024-06-14 13:30:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753478221] [2024-06-14 13:30:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753478221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:17,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:17,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952518252] [2024-06-14 13:30:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:17,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:17,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 1269 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:17,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:17,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:17,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:18,563 INFO L124 PetriNetUnfolderBase]: 2433/3927 cut-off events. [2024-06-14 13:30:18,564 INFO L125 PetriNetUnfolderBase]: For 162578/162578 co-relation queries the response was YES. [2024-06-14 13:30:18,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20515 conditions, 3927 events. 2433/3927 cut-off events. For 162578/162578 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22638 event pairs, 615 based on Foata normal form. 1/3923 useless extension candidates. Maximal degree in co-relation 20442. Up to 3483 conditions per place. [2024-06-14 13:30:18,592 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 51 changer transitions 0/222 dead transitions. [2024-06-14 13:30:18,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 222 transitions, 2183 flow [2024-06-14 13:30:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:30:18,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:30:18,594 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 1269 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:30:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 222 transitions, 2183 flow [2024-06-14 13:30:18,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 222 transitions, 2140 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:18,757 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1604 flow [2024-06-14 13:30:18,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1604, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-14 13:30:18,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-14 13:30:18,758 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1604 flow [2024-06-14 13:30:18,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:18,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:18,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:18,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:30:18,758 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)] === [2024-06-14 13:30:18,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1055541131, now seen corresponding path program 2 times [2024-06-14 13:30:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717655269] [2024-06-14 13:30:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717655269] [2024-06-14 13:30:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717655269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:21,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989975811] [2024-06-14 13:30:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:21,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:21,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:21,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1604 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:21,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:21,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:21,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:22,476 INFO L124 PetriNetUnfolderBase]: 2475/3987 cut-off events. [2024-06-14 13:30:22,477 INFO L125 PetriNetUnfolderBase]: For 177914/177914 co-relation queries the response was YES. [2024-06-14 13:30:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22107 conditions, 3987 events. 2475/3987 cut-off events. For 177914/177914 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23067 event pairs, 674 based on Foata normal form. 2/3987 useless extension candidates. Maximal degree in co-relation 22030. Up to 3747 conditions per place. [2024-06-14 13:30:22,509 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 189 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-14 13:30:22,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 229 transitions, 2389 flow [2024-06-14 13:30:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:30:22,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-14 13:30:22,511 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1604 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:30:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 229 transitions, 2389 flow [2024-06-14 13:30:22,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 229 transitions, 2341 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-14 13:30:22,703 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 1809 flow [2024-06-14 13:30:22,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1809, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2024-06-14 13:30:22,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-14 13:30:22,704 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1809 flow [2024-06-14 13:30:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:22,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:22,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:22,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:30:22,704 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)] === [2024-06-14 13:30:22,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1050034293, now seen corresponding path program 3 times [2024-06-14 13:30:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:22,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950237176] [2024-06-14 13:30:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950237176] [2024-06-14 13:30:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950237176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:25,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135963464] [2024-06-14 13:30:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:25,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:25,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:25,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1809 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:25,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:25,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:26,517 INFO L124 PetriNetUnfolderBase]: 2480/3987 cut-off events. [2024-06-14 13:30:26,517 INFO L125 PetriNetUnfolderBase]: For 185212/185212 co-relation queries the response was YES. [2024-06-14 13:30:26,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22830 conditions, 3987 events. 2480/3987 cut-off events. For 185212/185212 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22958 event pairs, 649 based on Foata normal form. 1/3971 useless extension candidates. Maximal degree in co-relation 22749. Up to 3535 conditions per place. [2024-06-14 13:30:26,548 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 167 selfloop transitions, 65 changer transitions 0/237 dead transitions. [2024-06-14 13:30:26,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 237 transitions, 2774 flow [2024-06-14 13:30:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:30:26,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-14 13:30:26,550 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 1809 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:30:26,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 237 transitions, 2774 flow [2024-06-14 13:30:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 237 transitions, 2665 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:26,755 INFO L231 Difference]: Finished difference. Result has 172 places, 212 transitions, 1997 flow [2024-06-14 13:30:26,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=172, PETRI_TRANSITIONS=212} [2024-06-14 13:30:26,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 13:30:26,756 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 212 transitions, 1997 flow [2024-06-14 13:30:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:26,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:30:26,757 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)] === [2024-06-14 13:30:26,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash 550590341, now seen corresponding path program 4 times [2024-06-14 13:30:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725603796] [2024-06-14 13:30:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725603796] [2024-06-14 13:30:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725603796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:29,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:29,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:29,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965635036] [2024-06-14 13:30:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:29,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:29,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:29,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:29,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 212 transitions, 1997 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:29,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:29,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:29,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:30,620 INFO L124 PetriNetUnfolderBase]: 2485/3996 cut-off events. [2024-06-14 13:30:30,620 INFO L125 PetriNetUnfolderBase]: For 194261/194261 co-relation queries the response was YES. [2024-06-14 13:30:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23353 conditions, 3996 events. 2485/3996 cut-off events. For 194261/194261 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23070 event pairs, 649 based on Foata normal form. 1/3980 useless extension candidates. Maximal degree in co-relation 23269. Up to 3539 conditions per place. [2024-06-14 13:30:30,653 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 161 selfloop transitions, 70 changer transitions 0/236 dead transitions. [2024-06-14 13:30:30,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 236 transitions, 2789 flow [2024-06-14 13:30:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:30:30,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-14 13:30:30,655 INFO L175 Difference]: Start difference. First operand has 172 places, 212 transitions, 1997 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:30:30,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 236 transitions, 2789 flow [2024-06-14 13:30:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 236 transitions, 2721 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-14 13:30:30,813 INFO L231 Difference]: Finished difference. Result has 178 places, 216 transitions, 2145 flow [2024-06-14 13:30:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2145, PETRI_PLACES=178, PETRI_TRANSITIONS=216} [2024-06-14 13:30:30,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-14 13:30:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 216 transitions, 2145 flow [2024-06-14 13:30:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:30,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:30,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:30:30,814 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)] === [2024-06-14 13:30:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -412773161, now seen corresponding path program 5 times [2024-06-14 13:30:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:30,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141005451] [2024-06-14 13:30:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141005451] [2024-06-14 13:30:33,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141005451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:33,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:33,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:33,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223919733] [2024-06-14 13:30:33,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:33,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:33,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:33,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:33,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 216 transitions, 2145 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:33,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:33,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:33,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:34,643 INFO L124 PetriNetUnfolderBase]: 2519/4044 cut-off events. [2024-06-14 13:30:34,643 INFO L125 PetriNetUnfolderBase]: For 207212/207212 co-relation queries the response was YES. [2024-06-14 13:30:34,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24155 conditions, 4044 events. 2519/4044 cut-off events. For 207212/207212 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23344 event pairs, 684 based on Foata normal form. 2/4036 useless extension candidates. Maximal degree in co-relation 24068. Up to 3764 conditions per place. [2024-06-14 13:30:34,679 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 52 changer transitions 0/247 dead transitions. [2024-06-14 13:30:34,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 247 transitions, 3063 flow [2024-06-14 13:30:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:30:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:30:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:30:34,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-06-14 13:30:34,684 INFO L175 Difference]: Start difference. First operand has 178 places, 216 transitions, 2145 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:30:34,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 247 transitions, 3063 flow [2024-06-14 13:30:34,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 2903 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:34,978 INFO L231 Difference]: Finished difference. Result has 186 places, 226 transitions, 2287 flow [2024-06-14 13:30:34,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2287, PETRI_PLACES=186, PETRI_TRANSITIONS=226} [2024-06-14 13:30:34,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 13:30:34,979 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 226 transitions, 2287 flow [2024-06-14 13:30:34,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:34,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:34,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:34,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:30:34,980 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)] === [2024-06-14 13:30:34,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2036443019, now seen corresponding path program 6 times [2024-06-14 13:30:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:34,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296605599] [2024-06-14 13:30:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:37,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296605599] [2024-06-14 13:30:37,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296605599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:37,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:37,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802821372] [2024-06-14 13:30:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:37,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:37,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:37,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:37,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 226 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:37,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:37,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:37,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:38,564 INFO L124 PetriNetUnfolderBase]: 2516/4032 cut-off events. [2024-06-14 13:30:38,564 INFO L125 PetriNetUnfolderBase]: For 213722/213722 co-relation queries the response was YES. [2024-06-14 13:30:38,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24629 conditions, 4032 events. 2516/4032 cut-off events. For 213722/213722 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23206 event pairs, 685 based on Foata normal form. 1/4023 useless extension candidates. Maximal degree in co-relation 24539. Up to 3762 conditions per place. [2024-06-14 13:30:38,598 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 184 selfloop transitions, 54 changer transitions 0/243 dead transitions. [2024-06-14 13:30:38,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 243 transitions, 2932 flow [2024-06-14 13:30:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:30:38,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-14 13:30:38,600 INFO L175 Difference]: Start difference. First operand has 186 places, 226 transitions, 2287 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:30:38,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 243 transitions, 2932 flow [2024-06-14 13:30:38,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 243 transitions, 2762 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:38,914 INFO L231 Difference]: Finished difference. Result has 189 places, 226 transitions, 2231 flow [2024-06-14 13:30:38,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2231, PETRI_PLACES=189, PETRI_TRANSITIONS=226} [2024-06-14 13:30:38,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 13:30:38,915 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 226 transitions, 2231 flow [2024-06-14 13:30:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:38,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:38,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:30:38,916 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:38,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1472518835, now seen corresponding path program 1 times [2024-06-14 13:30:38,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:38,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272139220] [2024-06-14 13:30:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:41,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:41,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272139220] [2024-06-14 13:30:41,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272139220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:41,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:41,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551611354] [2024-06-14 13:30:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:41,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:41,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 226 transitions, 2231 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:41,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:41,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:41,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:42,772 INFO L124 PetriNetUnfolderBase]: 2558/4109 cut-off events. [2024-06-14 13:30:42,773 INFO L125 PetriNetUnfolderBase]: For 228249/228253 co-relation queries the response was YES. [2024-06-14 13:30:42,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25079 conditions, 4109 events. 2558/4109 cut-off events. For 228249/228253 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23751 event pairs, 622 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 24988. Up to 3619 conditions per place. [2024-06-14 13:30:42,808 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 179 selfloop transitions, 81 changer transitions 0/265 dead transitions. [2024-06-14 13:30:42,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 3181 flow [2024-06-14 13:30:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:30:42,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:30:42,810 INFO L175 Difference]: Start difference. First operand has 189 places, 226 transitions, 2231 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:30:42,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 3181 flow [2024-06-14 13:30:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 265 transitions, 3097 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:43,033 INFO L231 Difference]: Finished difference. Result has 191 places, 235 transitions, 2449 flow [2024-06-14 13:30:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=191, PETRI_TRANSITIONS=235} [2024-06-14 13:30:43,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-14 13:30:43,034 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 235 transitions, 2449 flow [2024-06-14 13:30:43,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:43,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:30:43,039 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)] === [2024-06-14 13:30:43,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1460834293, now seen corresponding path program 1 times [2024-06-14 13:30:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:43,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083867953] [2024-06-14 13:30:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:45,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083867953] [2024-06-14 13:30:45,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083867953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:45,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:45,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437745738] [2024-06-14 13:30:45,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:45,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:45,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:45,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 235 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:45,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:45,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:47,530 INFO L124 PetriNetUnfolderBase]: 2584/4148 cut-off events. [2024-06-14 13:30:47,530 INFO L125 PetriNetUnfolderBase]: For 240790/240790 co-relation queries the response was YES. [2024-06-14 13:30:47,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25817 conditions, 4148 events. 2584/4148 cut-off events. For 240790/240790 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23915 event pairs, 650 based on Foata normal form. 2/4145 useless extension candidates. Maximal degree in co-relation 25725. Up to 3413 conditions per place. [2024-06-14 13:30:47,566 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 189 selfloop transitions, 90 changer transitions 0/284 dead transitions. [2024-06-14 13:30:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 284 transitions, 3513 flow [2024-06-14 13:30:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:30:47,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:30:47,568 INFO L175 Difference]: Start difference. First operand has 191 places, 235 transitions, 2449 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:30:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 284 transitions, 3513 flow [2024-06-14 13:30:47,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 284 transitions, 3402 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:47,836 INFO L231 Difference]: Finished difference. Result has 198 places, 250 transitions, 2792 flow [2024-06-14 13:30:47,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2792, PETRI_PLACES=198, PETRI_TRANSITIONS=250} [2024-06-14 13:30:47,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-14 13:30:47,836 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 250 transitions, 2792 flow [2024-06-14 13:30:47,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:47,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:47,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:30:47,837 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)] === [2024-06-14 13:30:47,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1106586367, now seen corresponding path program 2 times [2024-06-14 13:30:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:47,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931915886] [2024-06-14 13:30:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931915886] [2024-06-14 13:30:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931915886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:50,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:50,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602570703] [2024-06-14 13:30:50,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:50,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:50,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:50,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 250 transitions, 2792 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:50,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:50,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:50,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:52,176 INFO L124 PetriNetUnfolderBase]: 2594/4158 cut-off events. [2024-06-14 13:30:52,176 INFO L125 PetriNetUnfolderBase]: For 253650/253650 co-relation queries the response was YES. [2024-06-14 13:30:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 4158 events. 2594/4158 cut-off events. For 253650/253650 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23972 event pairs, 629 based on Foata normal form. 2/4155 useless extension candidates. Maximal degree in co-relation 26798. Up to 3665 conditions per place. [2024-06-14 13:30:52,208 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 196 selfloop transitions, 81 changer transitions 0/282 dead transitions. [2024-06-14 13:30:52,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 3590 flow [2024-06-14 13:30:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:30:52,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:30:52,210 INFO L175 Difference]: Start difference. First operand has 198 places, 250 transitions, 2792 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:30:52,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 3590 flow [2024-06-14 13:30:52,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 282 transitions, 3500 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:52,451 INFO L231 Difference]: Finished difference. Result has 203 places, 253 transitions, 2922 flow [2024-06-14 13:30:52,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=203, PETRI_TRANSITIONS=253} [2024-06-14 13:30:52,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 13:30:52,451 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 253 transitions, 2922 flow [2024-06-14 13:30:52,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:52,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:52,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:52,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:30:52,452 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:30:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1465482433, now seen corresponding path program 2 times [2024-06-14 13:30:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182065224] [2024-06-14 13:30:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182065224] [2024-06-14 13:30:55,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182065224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:55,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:55,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709102496] [2024-06-14 13:30:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:55,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:55,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:55,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 253 transitions, 2922 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:55,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:55,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:55,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:56,841 INFO L124 PetriNetUnfolderBase]: 2710/4324 cut-off events. [2024-06-14 13:30:56,841 INFO L125 PetriNetUnfolderBase]: For 286509/286509 co-relation queries the response was YES. [2024-06-14 13:30:56,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29062 conditions, 4324 events. 2710/4324 cut-off events. For 286509/286509 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24899 event pairs, 671 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 28965. Up to 3912 conditions per place. [2024-06-14 13:30:56,876 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 239 selfloop transitions, 62 changer transitions 0/306 dead transitions. [2024-06-14 13:30:56,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 306 transitions, 4193 flow [2024-06-14 13:30:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:30:56,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-14 13:30:56,879 INFO L175 Difference]: Start difference. First operand has 203 places, 253 transitions, 2922 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:30:56,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 306 transitions, 4193 flow [2024-06-14 13:30:57,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 306 transitions, 4005 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:57,214 INFO L231 Difference]: Finished difference. Result has 208 places, 267 transitions, 3115 flow [2024-06-14 13:30:57,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3115, PETRI_PLACES=208, PETRI_TRANSITIONS=267} [2024-06-14 13:30:57,215 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 13:30:57,215 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 267 transitions, 3115 flow [2024-06-14 13:30:57,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:57,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:57,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:30:57,216 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)] === [2024-06-14 13:30:57,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1513903465, now seen corresponding path program 3 times [2024-06-14 13:30:57,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:57,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376950674] [2024-06-14 13:30:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:57,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:59,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376950674] [2024-06-14 13:30:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376950674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:59,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:59,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102273939] [2024-06-14 13:30:59,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:59,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:30:59,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 267 transitions, 3115 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:59,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:59,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:30:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:01,021 INFO L124 PetriNetUnfolderBase]: 2698/4296 cut-off events. [2024-06-14 13:31:01,021 INFO L125 PetriNetUnfolderBase]: For 289856/289856 co-relation queries the response was YES. [2024-06-14 13:31:01,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29340 conditions, 4296 events. 2698/4296 cut-off events. For 289856/289856 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24719 event pairs, 696 based on Foata normal form. 4/4298 useless extension candidates. Maximal degree in co-relation 29241. Up to 4062 conditions per place. [2024-06-14 13:31:01,059 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 252 selfloop transitions, 35 changer transitions 0/292 dead transitions. [2024-06-14 13:31:01,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 292 transitions, 3797 flow [2024-06-14 13:31:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:31:01,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:31:01,061 INFO L175 Difference]: Start difference. First operand has 208 places, 267 transitions, 3115 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:31:01,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 292 transitions, 3797 flow [2024-06-14 13:31:01,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 292 transitions, 3606 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:01,434 INFO L231 Difference]: Finished difference. Result has 210 places, 267 transitions, 3004 flow [2024-06-14 13:31:01,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3004, PETRI_PLACES=210, PETRI_TRANSITIONS=267} [2024-06-14 13:31:01,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 13:31:01,435 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 267 transitions, 3004 flow [2024-06-14 13:31:01,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:01,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:01,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:01,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:31:01,435 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:01,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1637965813, now seen corresponding path program 3 times [2024-06-14 13:31:01,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:01,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12453059] [2024-06-14 13:31:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:04,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12453059] [2024-06-14 13:31:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12453059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232637188] [2024-06-14 13:31:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:04,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:04,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 267 transitions, 3004 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:04,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:04,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:04,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:05,626 INFO L124 PetriNetUnfolderBase]: 2686/4280 cut-off events. [2024-06-14 13:31:05,626 INFO L125 PetriNetUnfolderBase]: For 291176/291176 co-relation queries the response was YES. [2024-06-14 13:31:05,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28872 conditions, 4280 events. 2686/4280 cut-off events. For 291176/291176 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24634 event pairs, 669 based on Foata normal form. 4/4282 useless extension candidates. Maximal degree in co-relation 28771. Up to 3900 conditions per place. [2024-06-14 13:31:05,669 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 237 selfloop transitions, 64 changer transitions 0/306 dead transitions. [2024-06-14 13:31:05,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 306 transitions, 3974 flow [2024-06-14 13:31:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:31:05,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-14 13:31:05,671 INFO L175 Difference]: Start difference. First operand has 210 places, 267 transitions, 3004 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:31:05,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 306 transitions, 3974 flow [2024-06-14 13:31:06,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 306 transitions, 3904 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:06,056 INFO L231 Difference]: Finished difference. Result has 212 places, 271 transitions, 3172 flow [2024-06-14 13:31:06,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3172, PETRI_PLACES=212, PETRI_TRANSITIONS=271} [2024-06-14 13:31:06,056 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 13:31:06,056 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 271 transitions, 3172 flow [2024-06-14 13:31:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:06,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:06,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:31:06,057 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1500276491, now seen corresponding path program 1 times [2024-06-14 13:31:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580415322] [2024-06-14 13:31:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580415322] [2024-06-14 13:31:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580415322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:09,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:09,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598654351] [2024-06-14 13:31:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:09,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:09,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:09,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:09,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 271 transitions, 3172 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:09,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:09,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:09,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:11,494 INFO L124 PetriNetUnfolderBase]: 2730/4346 cut-off events. [2024-06-14 13:31:11,495 INFO L125 PetriNetUnfolderBase]: For 318133/318133 co-relation queries the response was YES. [2024-06-14 13:31:11,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29603 conditions, 4346 events. 2730/4346 cut-off events. For 318133/318133 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25049 event pairs, 680 based on Foata normal form. 12/4356 useless extension candidates. Maximal degree in co-relation 29501. Up to 4026 conditions per place. [2024-06-14 13:31:11,535 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 263 selfloop transitions, 39 changer transitions 0/307 dead transitions. [2024-06-14 13:31:11,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 307 transitions, 3978 flow [2024-06-14 13:31:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:31:11,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 13:31:11,537 INFO L175 Difference]: Start difference. First operand has 212 places, 271 transitions, 3172 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:31:11,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 307 transitions, 3978 flow [2024-06-14 13:31:11,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 307 transitions, 3788 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:11,997 INFO L231 Difference]: Finished difference. Result has 214 places, 272 transitions, 3084 flow [2024-06-14 13:31:11,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3084, PETRI_PLACES=214, PETRI_TRANSITIONS=272} [2024-06-14 13:31:11,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-14 13:31:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 272 transitions, 3084 flow [2024-06-14 13:31:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:11,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:11,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:31:11,998 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:11,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1563450975, now seen corresponding path program 4 times [2024-06-14 13:31:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746991660] [2024-06-14 13:31:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:14,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:14,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746991660] [2024-06-14 13:31:14,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746991660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:14,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:14,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:14,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439490396] [2024-06-14 13:31:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:14,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:14,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:14,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 272 transitions, 3084 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:14,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:14,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:14,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:15,729 INFO L124 PetriNetUnfolderBase]: 2740/4367 cut-off events. [2024-06-14 13:31:15,730 INFO L125 PetriNetUnfolderBase]: For 309431/309443 co-relation queries the response was YES. [2024-06-14 13:31:15,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29696 conditions, 4367 events. 2740/4367 cut-off events. For 309431/309443 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25262 event pairs, 651 based on Foata normal form. 10/4365 useless extension candidates. Maximal degree in co-relation 29593. Up to 3874 conditions per place. [2024-06-14 13:31:15,769 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 212 selfloop transitions, 85 changer transitions 0/302 dead transitions. [2024-06-14 13:31:15,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 302 transitions, 4065 flow [2024-06-14 13:31:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:31:15,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:31:15,771 INFO L175 Difference]: Start difference. First operand has 214 places, 272 transitions, 3084 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:31:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 302 transitions, 4065 flow [2024-06-14 13:31:16,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 302 transitions, 3985 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:16,224 INFO L231 Difference]: Finished difference. Result has 215 places, 276 transitions, 3250 flow [2024-06-14 13:31:16,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=215, PETRI_TRANSITIONS=276} [2024-06-14 13:31:16,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 13:31:16,225 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 276 transitions, 3250 flow [2024-06-14 13:31:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:16,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:16,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:16,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:31:16,226 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:31:16,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1333560021, now seen corresponding path program 5 times [2024-06-14 13:31:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:16,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232665185] [2024-06-14 13:31:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232665185] [2024-06-14 13:31:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232665185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:18,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:18,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:18,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904365936] [2024-06-14 13:31:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:18,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 276 transitions, 3250 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:18,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:20,281 INFO L124 PetriNetUnfolderBase]: 2750/4389 cut-off events. [2024-06-14 13:31:20,281 INFO L125 PetriNetUnfolderBase]: For 319655/319667 co-relation queries the response was YES. [2024-06-14 13:31:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30114 conditions, 4389 events. 2750/4389 cut-off events. For 319655/319667 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25431 event pairs, 665 based on Foata normal form. 10/4387 useless extension candidates. Maximal degree in co-relation 30010. Up to 3884 conditions per place. [2024-06-14 13:31:20,323 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 206 selfloop transitions, 90 changer transitions 0/301 dead transitions. [2024-06-14 13:31:20,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 4091 flow [2024-06-14 13:31:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:31:20,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:31:20,325 INFO L175 Difference]: Start difference. First operand has 215 places, 276 transitions, 3250 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:31:20,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 4091 flow [2024-06-14 13:31:20,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 301 transitions, 3988 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:31:20,830 INFO L231 Difference]: Finished difference. Result has 220 places, 280 transitions, 3400 flow [2024-06-14 13:31:20,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3400, PETRI_PLACES=220, PETRI_TRANSITIONS=280} [2024-06-14 13:31:20,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-14 13:31:20,830 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 280 transitions, 3400 flow [2024-06-14 13:31:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:20,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:20,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:31:20,831 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)] === [2024-06-14 13:31:20,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1103753481, now seen corresponding path program 6 times [2024-06-14 13:31:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:20,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584314272] [2024-06-14 13:31:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584314272] [2024-06-14 13:31:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584314272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012897943] [2024-06-14 13:31:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:23,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:23,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 280 transitions, 3400 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:23,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:23,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:23,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:25,255 INFO L124 PetriNetUnfolderBase]: 2760/4401 cut-off events. [2024-06-14 13:31:25,255 INFO L125 PetriNetUnfolderBase]: For 330210/330210 co-relation queries the response was YES. [2024-06-14 13:31:25,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30399 conditions, 4401 events. 2760/4401 cut-off events. For 330210/330210 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25482 event pairs, 705 based on Foata normal form. 2/4386 useless extension candidates. Maximal degree in co-relation 30293. Up to 3894 conditions per place. [2024-06-14 13:31:25,290 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 207 selfloop transitions, 96 changer transitions 0/308 dead transitions. [2024-06-14 13:31:25,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 308 transitions, 4265 flow [2024-06-14 13:31:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:31:25,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-14 13:31:25,292 INFO L175 Difference]: Start difference. First operand has 220 places, 280 transitions, 3400 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:31:25,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 308 transitions, 4265 flow [2024-06-14 13:31:25,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 308 transitions, 4135 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:31:25,575 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3529 flow [2024-06-14 13:31:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3529, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-14 13:31:25,575 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-14 13:31:25,575 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3529 flow [2024-06-14 13:31:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:25,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:25,576 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, 1] [2024-06-14 13:31:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:31:25,576 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)] === [2024-06-14 13:31:25,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1808672779, now seen corresponding path program 4 times [2024-06-14 13:31:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481571879] [2024-06-14 13:31:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:28,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:28,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481571879] [2024-06-14 13:31:28,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481571879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:28,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:28,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271024956] [2024-06-14 13:31:28,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:28,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:28,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:28,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:28,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:30,017 INFO L124 PetriNetUnfolderBase]: 2770/4421 cut-off events. [2024-06-14 13:31:30,018 INFO L125 PetriNetUnfolderBase]: For 342021/342021 co-relation queries the response was YES. [2024-06-14 13:31:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30761 conditions, 4421 events. 2770/4421 cut-off events. For 342021/342021 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25590 event pairs, 739 based on Foata normal form. 2/4406 useless extension candidates. Maximal degree in co-relation 30654. Up to 3608 conditions per place. [2024-06-14 13:31:30,058 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 197 selfloop transitions, 117 changer transitions 0/319 dead transitions. [2024-06-14 13:31:30,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 319 transitions, 4763 flow [2024-06-14 13:31:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:31:30,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:31:30,060 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3529 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:31:30,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 319 transitions, 4763 flow [2024-06-14 13:31:30,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 319 transitions, 4549 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:30,508 INFO L231 Difference]: Finished difference. Result has 227 places, 289 transitions, 3697 flow [2024-06-14 13:31:30,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3697, PETRI_PLACES=227, PETRI_TRANSITIONS=289} [2024-06-14 13:31:30,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 13:31:30,508 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 289 transitions, 3697 flow [2024-06-14 13:31:30,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:30,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:30,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:30,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:31:30,509 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)] === [2024-06-14 13:31:30,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1691301051, now seen corresponding path program 5 times [2024-06-14 13:31:30,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:30,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859405754] [2024-06-14 13:31:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:33,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:33,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859405754] [2024-06-14 13:31:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859405754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:33,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:33,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916082142] [2024-06-14 13:31:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:33,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:33,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:33,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 289 transitions, 3697 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:33,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:33,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:35,110 INFO L124 PetriNetUnfolderBase]: 2780/4440 cut-off events. [2024-06-14 13:31:35,110 INFO L125 PetriNetUnfolderBase]: For 353457/353457 co-relation queries the response was YES. [2024-06-14 13:31:35,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31219 conditions, 4440 events. 2780/4440 cut-off events. For 353457/353457 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25770 event pairs, 696 based on Foata normal form. 2/4438 useless extension candidates. Maximal degree in co-relation 31111. Up to 4126 conditions per place. [2024-06-14 13:31:35,143 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 266 selfloop transitions, 43 changer transitions 0/314 dead transitions. [2024-06-14 13:31:35,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 314 transitions, 4447 flow [2024-06-14 13:31:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:31:35,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-14 13:31:35,145 INFO L175 Difference]: Start difference. First operand has 227 places, 289 transitions, 3697 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:31:35,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 314 transitions, 4447 flow [2024-06-14 13:31:35,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 314 transitions, 4311 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 13:31:35,617 INFO L231 Difference]: Finished difference. Result has 232 places, 292 transitions, 3735 flow [2024-06-14 13:31:35,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3735, PETRI_PLACES=232, PETRI_TRANSITIONS=292} [2024-06-14 13:31:35,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 13:31:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 292 transitions, 3735 flow [2024-06-14 13:31:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:35,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:35,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:31:35,625 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)] === [2024-06-14 13:31:35,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1424887819, now seen corresponding path program 6 times [2024-06-14 13:31:35,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:35,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730145420] [2024-06-14 13:31:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730145420] [2024-06-14 13:31:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730145420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:38,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204645337] [2024-06-14 13:31:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:38,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 292 transitions, 3735 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:38,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:38,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:40,229 INFO L124 PetriNetUnfolderBase]: 2790/4453 cut-off events. [2024-06-14 13:31:40,230 INFO L125 PetriNetUnfolderBase]: For 363161/363161 co-relation queries the response was YES. [2024-06-14 13:31:40,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31500 conditions, 4453 events. 2790/4453 cut-off events. For 363161/363161 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25823 event pairs, 741 based on Foata normal form. 2/4438 useless extension candidates. Maximal degree in co-relation 31389. Up to 3620 conditions per place. [2024-06-14 13:31:40,271 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 193 selfloop transitions, 123 changer transitions 0/321 dead transitions. [2024-06-14 13:31:40,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 321 transitions, 4767 flow [2024-06-14 13:31:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:31:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 13:31:40,272 INFO L175 Difference]: Start difference. First operand has 232 places, 292 transitions, 3735 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:31:40,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 321 transitions, 4767 flow [2024-06-14 13:31:40,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 4623 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:40,770 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3911 flow [2024-06-14 13:31:40,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3591, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3911, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-14 13:31:40,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 13:31:40,771 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3911 flow [2024-06-14 13:31:40,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:40,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:40,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:40,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:31:40,772 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)] === [2024-06-14 13:31:40,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1132033407, now seen corresponding path program 7 times [2024-06-14 13:31:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492216397] [2024-06-14 13:31:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:43,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492216397] [2024-06-14 13:31:43,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492216397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:43,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:43,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:43,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312497377] [2024-06-14 13:31:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:43,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:43,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:43,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:43,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:43,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:43,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:45,212 INFO L124 PetriNetUnfolderBase]: 2784/4443 cut-off events. [2024-06-14 13:31:45,212 INFO L125 PetriNetUnfolderBase]: For 369848/369848 co-relation queries the response was YES. [2024-06-14 13:31:45,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31707 conditions, 4443 events. 2784/4443 cut-off events. For 369848/369848 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25813 event pairs, 698 based on Foata normal form. 2/4428 useless extension candidates. Maximal degree in co-relation 31595. Up to 3931 conditions per place. [2024-06-14 13:31:45,257 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 216 selfloop transitions, 97 changer transitions 0/318 dead transitions. [2024-06-14 13:31:45,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 318 transitions, 4867 flow [2024-06-14 13:31:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:31:45,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-14 13:31:45,259 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3911 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:31:45,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 318 transitions, 4867 flow [2024-06-14 13:31:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 318 transitions, 4619 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:45,702 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3863 flow [2024-06-14 13:31:45,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3863, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2024-06-14 13:31:45,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 13:31:45,718 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3863 flow [2024-06-14 13:31:45,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:45,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:45,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:45,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:31:45,719 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)] === [2024-06-14 13:31:45,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1797573415, now seen corresponding path program 8 times [2024-06-14 13:31:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:45,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067164455] [2024-06-14 13:31:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:48,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:48,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067164455] [2024-06-14 13:31:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067164455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:48,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:48,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725680295] [2024-06-14 13:31:48,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:48,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:48,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:48,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:48,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3863 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) [2024-06-14 13:31:48,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:48,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:48,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:51,056 INFO L124 PetriNetUnfolderBase]: 2778/4435 cut-off events. [2024-06-14 13:31:51,057 INFO L125 PetriNetUnfolderBase]: For 373974/373974 co-relation queries the response was YES. [2024-06-14 13:31:51,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31475 conditions, 4435 events. 2778/4435 cut-off events. For 373974/373974 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25710 event pairs, 699 based on Foata normal form. 2/4420 useless extension candidates. Maximal degree in co-relation 31362. Up to 3926 conditions per place. [2024-06-14 13:31:51,100 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 217 selfloop transitions, 98 changer transitions 0/320 dead transitions. [2024-06-14 13:31:51,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 320 transitions, 4695 flow [2024-06-14 13:31:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:31:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:31:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-14 13:31:51,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659090909090909 [2024-06-14 13:31:51,103 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3863 flow. Second operand 10 states and 161 transitions. [2024-06-14 13:31:51,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 320 transitions, 4695 flow [2024-06-14 13:31:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 320 transitions, 4517 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:51,634 INFO L231 Difference]: Finished difference. Result has 242 places, 295 transitions, 3887 flow [2024-06-14 13:31:51,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3887, PETRI_PLACES=242, PETRI_TRANSITIONS=295} [2024-06-14 13:31:51,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 13:31:51,635 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 295 transitions, 3887 flow [2024-06-14 13:31:51,635 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) [2024-06-14 13:31:51,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:51,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:51,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:31:51,635 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)] === [2024-06-14 13:31:51,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash 101865263, now seen corresponding path program 7 times [2024-06-14 13:31:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:51,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548278172] [2024-06-14 13:31:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:54,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:54,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548278172] [2024-06-14 13:31:54,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548278172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:54,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344873441] [2024-06-14 13:31:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:54,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:54,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:31:54,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 295 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:54,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:54,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:31:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:56,489 INFO L124 PetriNetUnfolderBase]: 2862/4559 cut-off events. [2024-06-14 13:31:56,489 INFO L125 PetriNetUnfolderBase]: For 405675/405675 co-relation queries the response was YES. [2024-06-14 13:31:56,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33061 conditions, 4559 events. 2862/4559 cut-off events. For 405675/405675 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26510 event pairs, 709 based on Foata normal form. 2/4559 useless extension candidates. Maximal degree in co-relation 32947. Up to 4250 conditions per place. [2024-06-14 13:31:56,620 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 296 selfloop transitions, 37 changer transitions 0/338 dead transitions. [2024-06-14 13:31:56,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 338 transitions, 5181 flow [2024-06-14 13:31:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:31:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:31:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-14 13:31:56,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-14 13:31:56,622 INFO L175 Difference]: Start difference. First operand has 242 places, 295 transitions, 3887 flow. Second operand 12 states and 184 transitions. [2024-06-14 13:31:56,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 338 transitions, 5181 flow [2024-06-14 13:31:57,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 338 transitions, 4985 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:31:57,285 INFO L231 Difference]: Finished difference. Result has 249 places, 309 transitions, 4058 flow [2024-06-14 13:31:57,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4058, PETRI_PLACES=249, PETRI_TRANSITIONS=309} [2024-06-14 13:31:57,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-14 13:31:57,286 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 309 transitions, 4058 flow [2024-06-14 13:31:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:57,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:57,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:31:57,287 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)] === [2024-06-14 13:31:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1088362067, now seen corresponding path program 8 times [2024-06-14 13:31:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420155272] [2024-06-14 13:31:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:00,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:00,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420155272] [2024-06-14 13:32:00,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420155272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:00,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742767141] [2024-06-14 13:32:00,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:00,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:00,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 309 transitions, 4058 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:00,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:00,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:00,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:02,022 INFO L124 PetriNetUnfolderBase]: 3010/4752 cut-off events. [2024-06-14 13:32:02,022 INFO L125 PetriNetUnfolderBase]: For 459726/459726 co-relation queries the response was YES. [2024-06-14 13:32:02,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35753 conditions, 4752 events. 3010/4752 cut-off events. For 459726/459726 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27478 event pairs, 701 based on Foata normal form. 4/4746 useless extension candidates. Maximal degree in co-relation 35635. Up to 4031 conditions per place. [2024-06-14 13:32:02,066 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 245 selfloop transitions, 111 changer transitions 0/361 dead transitions. [2024-06-14 13:32:02,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 361 transitions, 5753 flow [2024-06-14 13:32:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:32:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:32:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:32:02,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884297520661157 [2024-06-14 13:32:02,068 INFO L175 Difference]: Start difference. First operand has 249 places, 309 transitions, 4058 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:32:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 361 transitions, 5753 flow [2024-06-14 13:32:02,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 361 transitions, 5629 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:02,627 INFO L231 Difference]: Finished difference. Result has 257 places, 325 transitions, 4541 flow [2024-06-14 13:32:02,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4541, PETRI_PLACES=257, PETRI_TRANSITIONS=325} [2024-06-14 13:32:02,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-14 13:32:02,628 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 325 transitions, 4541 flow [2024-06-14 13:32:02,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:02,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:02,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:02,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:32:02,629 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)] === [2024-06-14 13:32:02,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1464747007, now seen corresponding path program 9 times [2024-06-14 13:32:02,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:02,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119335744] [2024-06-14 13:32:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:02,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:05,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:05,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119335744] [2024-06-14 13:32:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119335744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:05,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:05,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:05,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852269042] [2024-06-14 13:32:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:05,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:05,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 325 transitions, 4541 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:05,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:05,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:05,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:07,251 INFO L124 PetriNetUnfolderBase]: 3004/4763 cut-off events. [2024-06-14 13:32:07,251 INFO L125 PetriNetUnfolderBase]: For 468839/468839 co-relation queries the response was YES. [2024-06-14 13:32:07,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36708 conditions, 4763 events. 3004/4763 cut-off events. For 468839/468839 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27691 event pairs, 734 based on Foata normal form. 2/4763 useless extension candidates. Maximal degree in co-relation 36586. Up to 4451 conditions per place. [2024-06-14 13:32:07,298 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 308 selfloop transitions, 36 changer transitions 0/349 dead transitions. [2024-06-14 13:32:07,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 349 transitions, 5468 flow [2024-06-14 13:32:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:32:07,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568181818181818 [2024-06-14 13:32:07,300 INFO L175 Difference]: Start difference. First operand has 257 places, 325 transitions, 4541 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:32:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 349 transitions, 5468 flow [2024-06-14 13:32:08,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 349 transitions, 5079 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-14 13:32:08,244 INFO L231 Difference]: Finished difference. Result has 259 places, 325 transitions, 4230 flow [2024-06-14 13:32:08,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4230, PETRI_PLACES=259, PETRI_TRANSITIONS=325} [2024-06-14 13:32:08,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 13:32:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 325 transitions, 4230 flow [2024-06-14 13:32:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:32:08,246 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)] === [2024-06-14 13:32:08,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1088124731, now seen corresponding path program 9 times [2024-06-14 13:32:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612866227] [2024-06-14 13:32:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:10,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:10,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612866227] [2024-06-14 13:32:10,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612866227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:10,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:10,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:10,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843401619] [2024-06-14 13:32:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:10,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:10,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:10,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 325 transitions, 4230 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:10,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:10,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:10,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:12,530 INFO L124 PetriNetUnfolderBase]: 2992/4736 cut-off events. [2024-06-14 13:32:12,530 INFO L125 PetriNetUnfolderBase]: For 470826/470826 co-relation queries the response was YES. [2024-06-14 13:32:12,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35391 conditions, 4736 events. 2992/4736 cut-off events. For 470826/470826 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27548 event pairs, 765 based on Foata normal form. 4/4730 useless extension candidates. Maximal degree in co-relation 35269. Up to 4435 conditions per place. [2024-06-14 13:32:12,569 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 284 selfloop transitions, 56 changer transitions 0/345 dead transitions. [2024-06-14 13:32:12,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 345 transitions, 5123 flow [2024-06-14 13:32:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:32:12,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-06-14 13:32:12,571 INFO L175 Difference]: Start difference. First operand has 259 places, 325 transitions, 4230 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:32:12,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 345 transitions, 5123 flow [2024-06-14 13:32:13,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 345 transitions, 5045 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:32:13,195 INFO L231 Difference]: Finished difference. Result has 259 places, 325 transitions, 4275 flow [2024-06-14 13:32:13,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4275, PETRI_PLACES=259, PETRI_TRANSITIONS=325} [2024-06-14 13:32:13,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 13:32:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 325 transitions, 4275 flow [2024-06-14 13:32:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:13,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:13,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:32:13,196 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)] === [2024-06-14 13:32:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1294778357, now seen corresponding path program 10 times [2024-06-14 13:32:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437511993] [2024-06-14 13:32:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:16,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:16,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437511993] [2024-06-14 13:32:16,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437511993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:16,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:16,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179300916] [2024-06-14 13:32:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:16,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:16,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 325 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:16,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:16,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:16,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:17,765 INFO L124 PetriNetUnfolderBase]: 2986/4724 cut-off events. [2024-06-14 13:32:17,765 INFO L125 PetriNetUnfolderBase]: For 471729/471729 co-relation queries the response was YES. [2024-06-14 13:32:17,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35358 conditions, 4724 events. 2986/4724 cut-off events. For 471729/471729 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27367 event pairs, 707 based on Foata normal form. 2/4716 useless extension candidates. Maximal degree in co-relation 35235. Up to 4019 conditions per place. [2024-06-14 13:32:17,808 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 229 selfloop transitions, 122 changer transitions 0/356 dead transitions. [2024-06-14 13:32:17,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 356 transitions, 5623 flow [2024-06-14 13:32:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:32:17,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:32:17,813 INFO L175 Difference]: Start difference. First operand has 259 places, 325 transitions, 4275 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:32:17,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 356 transitions, 5623 flow [2024-06-14 13:32:18,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 356 transitions, 5534 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:18,476 INFO L231 Difference]: Finished difference. Result has 263 places, 331 transitions, 4622 flow [2024-06-14 13:32:18,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4622, PETRI_PLACES=263, PETRI_TRANSITIONS=331} [2024-06-14 13:32:18,483 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-14 13:32:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 331 transitions, 4622 flow [2024-06-14 13:32:18,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:18,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:18,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:18,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:32:18,483 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)] === [2024-06-14 13:32:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1036413187, now seen corresponding path program 11 times [2024-06-14 13:32:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142292914] [2024-06-14 13:32:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:21,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:21,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142292914] [2024-06-14 13:32:21,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142292914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:21,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:21,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761074789] [2024-06-14 13:32:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:21,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:21,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:21,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:21,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 331 transitions, 4622 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:21,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:21,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:22,957 INFO L124 PetriNetUnfolderBase]: 2974/4714 cut-off events. [2024-06-14 13:32:22,957 INFO L125 PetriNetUnfolderBase]: For 480530/480530 co-relation queries the response was YES. [2024-06-14 13:32:22,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35617 conditions, 4714 events. 2974/4714 cut-off events. For 480530/480530 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27300 event pairs, 702 based on Foata normal form. 4/4708 useless extension candidates. Maximal degree in co-relation 35492. Up to 4013 conditions per place. [2024-06-14 13:32:23,001 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 242 selfloop transitions, 115 changer transitions 0/362 dead transitions. [2024-06-14 13:32:23,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 5956 flow [2024-06-14 13:32:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:32:23,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-14 13:32:23,003 INFO L175 Difference]: Start difference. First operand has 263 places, 331 transitions, 4622 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:32:23,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 5956 flow [2024-06-14 13:32:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 362 transitions, 5669 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:23,703 INFO L231 Difference]: Finished difference. Result has 267 places, 332 transitions, 4624 flow [2024-06-14 13:32:23,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4624, PETRI_PLACES=267, PETRI_TRANSITIONS=332} [2024-06-14 13:32:23,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-14 13:32:23,704 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 332 transitions, 4624 flow [2024-06-14 13:32:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:23,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:32:23,705 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)] === [2024-06-14 13:32:23,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1295045081, now seen corresponding path program 10 times [2024-06-14 13:32:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133198244] [2024-06-14 13:32:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133198244] [2024-06-14 13:32:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133198244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:26,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905427963] [2024-06-14 13:32:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:26,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:26,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:26,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 332 transitions, 4624 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:26,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:26,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:26,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:27,669 INFO L124 PetriNetUnfolderBase]: 2968/4696 cut-off events. [2024-06-14 13:32:27,669 INFO L125 PetriNetUnfolderBase]: For 477317/477317 co-relation queries the response was YES. [2024-06-14 13:32:27,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35452 conditions, 4696 events. 2968/4696 cut-off events. For 477317/477317 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27250 event pairs, 760 based on Foata normal form. 2/4688 useless extension candidates. Maximal degree in co-relation 35326. Up to 4406 conditions per place. [2024-06-14 13:32:27,710 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 286 selfloop transitions, 57 changer transitions 0/348 dead transitions. [2024-06-14 13:32:27,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 348 transitions, 5354 flow [2024-06-14 13:32:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:32:27,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-14 13:32:27,719 INFO L175 Difference]: Start difference. First operand has 267 places, 332 transitions, 4624 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:32:27,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 348 transitions, 5354 flow [2024-06-14 13:32:28,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 348 transitions, 5050 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 13:32:28,387 INFO L231 Difference]: Finished difference. Result has 267 places, 332 transitions, 4440 flow [2024-06-14 13:32:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4320, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4440, PETRI_PLACES=267, PETRI_TRANSITIONS=332} [2024-06-14 13:32:28,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-14 13:32:28,388 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 332 transitions, 4440 flow [2024-06-14 13:32:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:28,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:28,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:28,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:32:28,389 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)] === [2024-06-14 13:32:28,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1295223827, now seen corresponding path program 12 times [2024-06-14 13:32:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391123092] [2024-06-14 13:32:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391123092] [2024-06-14 13:32:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391123092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:31,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:31,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476303216] [2024-06-14 13:32:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:31,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:31,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 332 transitions, 4440 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:31,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:31,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:33,176 INFO L124 PetriNetUnfolderBase]: 2962/4705 cut-off events. [2024-06-14 13:32:33,176 INFO L125 PetriNetUnfolderBase]: For 484086/484086 co-relation queries the response was YES. [2024-06-14 13:32:33,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34965 conditions, 4705 events. 2962/4705 cut-off events. For 484086/484086 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27410 event pairs, 725 based on Foata normal form. 2/4705 useless extension candidates. Maximal degree in co-relation 34839. Up to 4464 conditions per place. [2024-06-14 13:32:33,218 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 320 selfloop transitions, 27 changer transitions 0/352 dead transitions. [2024-06-14 13:32:33,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 352 transitions, 5182 flow [2024-06-14 13:32:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:32:33,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2024-06-14 13:32:33,220 INFO L175 Difference]: Start difference. First operand has 267 places, 332 transitions, 4440 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:32:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 352 transitions, 5182 flow [2024-06-14 13:32:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 352 transitions, 4974 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 13:32:33,885 INFO L231 Difference]: Finished difference. Result has 267 places, 332 transitions, 4292 flow [2024-06-14 13:32:33,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4232, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4292, PETRI_PLACES=267, PETRI_TRANSITIONS=332} [2024-06-14 13:32:33,889 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-14 13:32:33,889 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 332 transitions, 4292 flow [2024-06-14 13:32:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:33,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:33,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:32:33,889 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)] === [2024-06-14 13:32:33,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1088370995, now seen corresponding path program 2 times [2024-06-14 13:32:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:33,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113051830] [2024-06-14 13:32:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:37,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:37,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113051830] [2024-06-14 13:32:37,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113051830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:37,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:37,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611542804] [2024-06-14 13:32:37,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:37,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:37,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:37,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 332 transitions, 4292 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:37,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:37,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:37,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:39,391 INFO L124 PetriNetUnfolderBase]: 3006/4766 cut-off events. [2024-06-14 13:32:39,391 INFO L125 PetriNetUnfolderBase]: For 523454/523454 co-relation queries the response was YES. [2024-06-14 13:32:39,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35314 conditions, 4766 events. 3006/4766 cut-off events. For 523454/523454 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27816 event pairs, 724 based on Foata normal form. 12/4768 useless extension candidates. Maximal degree in co-relation 35187. Up to 4418 conditions per place. [2024-06-14 13:32:39,435 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 315 selfloop transitions, 39 changer transitions 0/359 dead transitions. [2024-06-14 13:32:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 359 transitions, 5169 flow [2024-06-14 13:32:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:32:39,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:32:39,437 INFO L175 Difference]: Start difference. First operand has 267 places, 332 transitions, 4292 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:32:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 359 transitions, 5169 flow [2024-06-14 13:32:40,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 5071 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:32:40,096 INFO L231 Difference]: Finished difference. Result has 266 places, 333 transitions, 4298 flow [2024-06-14 13:32:40,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4298, PETRI_PLACES=266, PETRI_TRANSITIONS=333} [2024-06-14 13:32:40,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-14 13:32:40,096 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 333 transitions, 4298 flow [2024-06-14 13:32:40,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:40,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:40,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:40,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:32:40,097 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)] === [2024-06-14 13:32:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1531199795, now seen corresponding path program 3 times [2024-06-14 13:32:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677567513] [2024-06-14 13:32:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:43,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:43,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677567513] [2024-06-14 13:32:43,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677567513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:43,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:43,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:43,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356912528] [2024-06-14 13:32:43,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:43,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:43,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:43,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:43,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:43,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 333 transitions, 4298 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:43,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:43,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:43,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:45,724 INFO L124 PetriNetUnfolderBase]: 3050/4851 cut-off events. [2024-06-14 13:32:45,724 INFO L125 PetriNetUnfolderBase]: For 537943/537943 co-relation queries the response was YES. [2024-06-14 13:32:45,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35921 conditions, 4851 events. 3050/4851 cut-off events. For 537943/537943 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28468 event pairs, 761 based on Foata normal form. 12/4861 useless extension candidates. Maximal degree in co-relation 35795. Up to 4587 conditions per place. [2024-06-14 13:32:45,766 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 333 selfloop transitions, 17 changer transitions 0/355 dead transitions. [2024-06-14 13:32:45,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 5100 flow [2024-06-14 13:32:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:32:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:32:45,768 INFO L175 Difference]: Start difference. First operand has 266 places, 333 transitions, 4298 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:32:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 5100 flow [2024-06-14 13:32:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 355 transitions, 5018 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:46,594 INFO L231 Difference]: Finished difference. Result has 268 places, 334 transitions, 4278 flow [2024-06-14 13:32:46,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4278, PETRI_PLACES=268, PETRI_TRANSITIONS=334} [2024-06-14 13:32:46,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 13:32:46,595 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 334 transitions, 4278 flow [2024-06-14 13:32:46,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:46,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:46,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:32:46,595 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)] === [2024-06-14 13:32:46,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1479993055, now seen corresponding path program 4 times [2024-06-14 13:32:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:46,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571541324] [2024-06-14 13:32:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:50,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:50,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571541324] [2024-06-14 13:32:50,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571541324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:50,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:50,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:50,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783121958] [2024-06-14 13:32:50,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:50,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:32:50,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 334 transitions, 4278 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:50,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:50,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:32:50,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:51,875 INFO L124 PetriNetUnfolderBase]: 3052/4853 cut-off events. [2024-06-14 13:32:51,875 INFO L125 PetriNetUnfolderBase]: For 525387/525387 co-relation queries the response was YES. [2024-06-14 13:32:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35691 conditions, 4853 events. 3052/4853 cut-off events. For 525387/525387 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28446 event pairs, 739 based on Foata normal form. 8/4859 useless extension candidates. Maximal degree in co-relation 35564. Up to 4555 conditions per place. [2024-06-14 13:32:51,919 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 336 selfloop transitions, 20 changer transitions 0/361 dead transitions. [2024-06-14 13:32:51,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 361 transitions, 5126 flow [2024-06-14 13:32:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:32:51,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-14 13:32:51,920 INFO L175 Difference]: Start difference. First operand has 268 places, 334 transitions, 4278 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:32:51,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 361 transitions, 5126 flow [2024-06-14 13:32:52,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 361 transitions, 5086 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:52,641 INFO L231 Difference]: Finished difference. Result has 271 places, 335 transitions, 4306 flow [2024-06-14 13:32:52,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4306, PETRI_PLACES=271, PETRI_TRANSITIONS=335} [2024-06-14 13:32:52,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-14 13:32:52,642 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 335 transitions, 4306 flow [2024-06-14 13:32:52,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:52,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:52,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:52,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:32:52,642 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)] === [2024-06-14 13:32:52,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1572984095, now seen corresponding path program 1 times [2024-06-14 13:32:52,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:52,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278186368] [2024-06-14 13:32:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278186368] [2024-06-14 13:32:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278186368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:55,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:55,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:55,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660356128] [2024-06-14 13:32:55,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:32:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 335 transitions, 4306 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:32:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:57,661 INFO L124 PetriNetUnfolderBase]: 3002/4845 cut-off events. [2024-06-14 13:32:57,662 INFO L125 PetriNetUnfolderBase]: For 499426/499445 co-relation queries the response was YES. [2024-06-14 13:32:57,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34711 conditions, 4845 events. 3002/4845 cut-off events. For 499426/499445 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29148 event pairs, 626 based on Foata normal form. 10/4823 useless extension candidates. Maximal degree in co-relation 34583. Up to 4257 conditions per place. [2024-06-14 13:32:57,705 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 293 selfloop transitions, 42 changer transitions 0/371 dead transitions. [2024-06-14 13:32:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 371 transitions, 5280 flow [2024-06-14 13:32:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:32:57,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 13:32:57,707 INFO L175 Difference]: Start difference. First operand has 271 places, 335 transitions, 4306 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:32:57,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 371 transitions, 5280 flow [2024-06-14 13:32:58,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 371 transitions, 5228 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:58,539 INFO L231 Difference]: Finished difference. Result has 271 places, 337 transitions, 4368 flow [2024-06-14 13:32:58,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4368, PETRI_PLACES=271, PETRI_TRANSITIONS=337} [2024-06-14 13:32:58,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-14 13:32:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 337 transitions, 4368 flow [2024-06-14 13:32:58,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:58,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:58,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:58,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:32:58,540 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)] === [2024-06-14 13:32:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1333454621, now seen corresponding path program 2 times [2024-06-14 13:32:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:58,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751389187] [2024-06-14 13:32:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:01,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751389187] [2024-06-14 13:33:01,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751389187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:01,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:01,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965474147] [2024-06-14 13:33:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:33:01,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 337 transitions, 4368 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:01,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:01,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:33:01,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:03,424 INFO L124 PetriNetUnfolderBase]: 3054/4929 cut-off events. [2024-06-14 13:33:03,424 INFO L125 PetriNetUnfolderBase]: For 535058/535081 co-relation queries the response was YES. [2024-06-14 13:33:03,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35408 conditions, 4929 events. 3054/4929 cut-off events. For 535058/535081 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29741 event pairs, 656 based on Foata normal form. 16/4904 useless extension candidates. Maximal degree in co-relation 35279. Up to 4442 conditions per place. [2024-06-14 13:33:03,468 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 289 selfloop transitions, 40 changer transitions 0/365 dead transitions. [2024-06-14 13:33:03,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 365 transitions, 5132 flow [2024-06-14 13:33:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:33:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:33:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:33:03,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:33:03,471 INFO L175 Difference]: Start difference. First operand has 271 places, 337 transitions, 4368 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:33:03,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 365 transitions, 5132 flow [2024-06-14 13:33:04,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 5081 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:33:04,272 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 4419 flow [2024-06-14 13:33:04,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4419, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-14 13:33:04,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 13:33:04,273 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 4419 flow [2024-06-14 13:33:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:04,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:04,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:04,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:33:04,274 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)] === [2024-06-14 13:33:04,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash 393073941, now seen corresponding path program 3 times [2024-06-14 13:33:04,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:04,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860462366] [2024-06-14 13:33:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:04,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860462366] [2024-06-14 13:33:07,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860462366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:07,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:07,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:07,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149015026] [2024-06-14 13:33:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:07,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:07,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:07,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:33:07,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 4419 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:07,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:07,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:33:07,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:09,762 INFO L124 PetriNetUnfolderBase]: 3102/5001 cut-off events. [2024-06-14 13:33:09,763 INFO L125 PetriNetUnfolderBase]: For 544720/544736 co-relation queries the response was YES. [2024-06-14 13:33:09,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36016 conditions, 5001 events. 3102/5001 cut-off events. For 544720/544736 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30175 event pairs, 675 based on Foata normal form. 14/4985 useless extension candidates. Maximal degree in co-relation 35885. Up to 4514 conditions per place. [2024-06-14 13:33:09,821 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 289 selfloop transitions, 43 changer transitions 0/368 dead transitions. [2024-06-14 13:33:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 5195 flow [2024-06-14 13:33:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:33:09,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 13:33:09,823 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 4419 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:33:09,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 5195 flow [2024-06-14 13:33:10,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 368 transitions, 5113 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:10,758 INFO L231 Difference]: Finished difference. Result has 278 places, 339 transitions, 4447 flow [2024-06-14 13:33:10,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4447, PETRI_PLACES=278, PETRI_TRANSITIONS=339} [2024-06-14 13:33:10,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 13:33:10,759 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 339 transitions, 4447 flow [2024-06-14 13:33:10,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:10,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:10,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:10,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:33:10,760 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)] === [2024-06-14 13:33:10,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1424426477, now seen corresponding path program 1 times [2024-06-14 13:33:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:10,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075282644] [2024-06-14 13:33:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:14,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:14,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075282644] [2024-06-14 13:33:14,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075282644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:14,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:14,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315577416] [2024-06-14 13:33:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:14,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 339 transitions, 4447 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:16,588 INFO L124 PetriNetUnfolderBase]: 3246/5160 cut-off events. [2024-06-14 13:33:16,588 INFO L125 PetriNetUnfolderBase]: For 585169/585169 co-relation queries the response was YES. [2024-06-14 13:33:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38671 conditions, 5160 events. 3246/5160 cut-off events. For 585169/585169 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30506 event pairs, 752 based on Foata normal form. 2/5158 useless extension candidates. Maximal degree in co-relation 38539. Up to 4814 conditions per place. [2024-06-14 13:33:16,645 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 313 selfloop transitions, 45 changer transitions 0/363 dead transitions. [2024-06-14 13:33:16,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 363 transitions, 5281 flow [2024-06-14 13:33:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:33:16,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-14 13:33:16,646 INFO L175 Difference]: Start difference. First operand has 278 places, 339 transitions, 4447 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:33:16,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 363 transitions, 5281 flow [2024-06-14 13:33:17,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 5191 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:17,674 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 4518 flow [2024-06-14 13:33:17,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4518, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2024-06-14 13:33:17,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-14 13:33:17,675 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 4518 flow [2024-06-14 13:33:17,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:17,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:17,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:17,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:33:17,676 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)] === [2024-06-14 13:33:17,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash -807859839, now seen corresponding path program 4 times [2024-06-14 13:33:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:17,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319091717] [2024-06-14 13:33:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:21,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:21,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319091717] [2024-06-14 13:33:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319091717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:21,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364087731] [2024-06-14 13:33:21,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:21,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 13:33:21,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 4518 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:21,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:21,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 13:33:21,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:22,673 INFO L124 PetriNetUnfolderBase]: 3076/4956 cut-off events. [2024-06-14 13:33:22,673 INFO L125 PetriNetUnfolderBase]: For 521422/521440 co-relation queries the response was YES. [2024-06-14 13:33:22,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34988 conditions, 4956 events. 3076/4956 cut-off events. For 521422/521440 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29977 event pairs, 704 based on Foata normal form. 14/4941 useless extension candidates. Maximal degree in co-relation 34855. Up to 4555 conditions per place. [2024-06-14 13:33:22,724 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 304 selfloop transitions, 24 changer transitions 0/364 dead transitions. [2024-06-14 13:33:22,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 364 transitions, 5254 flow [2024-06-14 13:33:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:33:22,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:33:22,726 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 4518 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:33:22,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 364 transitions, 5254 flow [2024-06-14 13:33:23,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 364 transitions, 5105 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:23,571 INFO L231 Difference]: Finished difference. Result has 282 places, 341 transitions, 4423 flow [2024-06-14 13:33:23,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4423, PETRI_PLACES=282, PETRI_TRANSITIONS=341} [2024-06-14 13:33:23,572 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-14 13:33:23,572 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 341 transitions, 4423 flow [2024-06-14 13:33:23,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:23,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:23,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:23,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:33:23,572 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)] === [2024-06-14 13:33:23,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash 54172619, now seen corresponding path program 2 times [2024-06-14 13:33:23,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:23,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787187911] [2024-06-14 13:33:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:27,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787187911] [2024-06-14 13:33:27,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787187911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:27,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:27,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:27,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241901412] [2024-06-14 13:33:27,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:27,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:27,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 341 transitions, 4423 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:27,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:27,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:28,742 INFO L124 PetriNetUnfolderBase]: 3221/5124 cut-off events. [2024-06-14 13:33:28,742 INFO L125 PetriNetUnfolderBase]: For 561918/561918 co-relation queries the response was YES. [2024-06-14 13:33:28,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 5124 events. 3221/5124 cut-off events. For 561918/561918 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30348 event pairs, 778 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 37331. Up to 4871 conditions per place. [2024-06-14 13:33:28,799 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 332 selfloop transitions, 26 changer transitions 0/363 dead transitions. [2024-06-14 13:33:28,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 363 transitions, 5253 flow [2024-06-14 13:33:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:33:28,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2024-06-14 13:33:28,801 INFO L175 Difference]: Start difference. First operand has 282 places, 341 transitions, 4423 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:33:28,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 363 transitions, 5253 flow [2024-06-14 13:33:29,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 363 transitions, 5196 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:29,811 INFO L231 Difference]: Finished difference. Result has 285 places, 343 transitions, 4493 flow [2024-06-14 13:33:29,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4493, PETRI_PLACES=285, PETRI_TRANSITIONS=343} [2024-06-14 13:33:29,812 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-14 13:33:29,812 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 343 transitions, 4493 flow [2024-06-14 13:33:29,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:29,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:29,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:29,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:33:29,813 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)] === [2024-06-14 13:33:29,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1531415059, now seen corresponding path program 3 times [2024-06-14 13:33:29,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:29,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042473341] [2024-06-14 13:33:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:29,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042473341] [2024-06-14 13:33:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042473341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:33,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789086633] [2024-06-14 13:33:33,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:33,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:33,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:33,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 343 transitions, 4493 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:33,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:33,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:35,564 INFO L124 PetriNetUnfolderBase]: 3229/5126 cut-off events. [2024-06-14 13:33:35,565 INFO L125 PetriNetUnfolderBase]: For 576452/576452 co-relation queries the response was YES. [2024-06-14 13:33:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37730 conditions, 5126 events. 3229/5126 cut-off events. For 576452/576452 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30278 event pairs, 778 based on Foata normal form. 2/5126 useless extension candidates. Maximal degree in co-relation 37595. Up to 4883 conditions per place. [2024-06-14 13:33:35,611 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 335 selfloop transitions, 26 changer transitions 0/366 dead transitions. [2024-06-14 13:33:35,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 366 transitions, 5335 flow [2024-06-14 13:33:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-14 13:33:35,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-14 13:33:35,612 INFO L175 Difference]: Start difference. First operand has 285 places, 343 transitions, 4493 flow. Second operand 10 states and 152 transitions. [2024-06-14 13:33:35,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 366 transitions, 5335 flow [2024-06-14 13:33:36,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 366 transitions, 5224 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:36,536 INFO L231 Difference]: Finished difference. Result has 288 places, 345 transitions, 4513 flow [2024-06-14 13:33:36,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4513, PETRI_PLACES=288, PETRI_TRANSITIONS=345} [2024-06-14 13:33:36,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 13:33:36,537 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 345 transitions, 4513 flow [2024-06-14 13:33:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:36,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:36,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:33:36,538 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)] === [2024-06-14 13:33:36,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1479999999, now seen corresponding path program 4 times [2024-06-14 13:33:36,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:36,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258091990] [2024-06-14 13:33:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258091990] [2024-06-14 13:33:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258091990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:40,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:40,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964975713] [2024-06-14 13:33:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:40,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:40,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:40,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 345 transitions, 4513 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:40,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:40,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:40,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:42,089 INFO L124 PetriNetUnfolderBase]: 3298/5233 cut-off events. [2024-06-14 13:33:42,090 INFO L125 PetriNetUnfolderBase]: For 612730/612730 co-relation queries the response was YES. [2024-06-14 13:33:42,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38859 conditions, 5233 events. 3298/5233 cut-off events. For 612730/612730 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30973 event pairs, 789 based on Foata normal form. 2/5233 useless extension candidates. Maximal degree in co-relation 38723. Up to 4860 conditions per place. [2024-06-14 13:33:42,149 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 340 selfloop transitions, 31 changer transitions 0/376 dead transitions. [2024-06-14 13:33:42,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 376 transitions, 5620 flow [2024-06-14 13:33:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:33:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:33:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:33:42,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-06-14 13:33:42,150 INFO L175 Difference]: Start difference. First operand has 288 places, 345 transitions, 4513 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:33:42,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 376 transitions, 5620 flow [2024-06-14 13:33:43,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 376 transitions, 5505 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 13:33:43,184 INFO L231 Difference]: Finished difference. Result has 291 places, 349 transitions, 4586 flow [2024-06-14 13:33:43,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4586, PETRI_PLACES=291, PETRI_TRANSITIONS=349} [2024-06-14 13:33:43,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-14 13:33:43,185 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 349 transitions, 4586 flow [2024-06-14 13:33:43,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:43,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:43,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:43,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:33:43,185 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)] === [2024-06-14 13:33:43,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2041914004, now seen corresponding path program 1 times [2024-06-14 13:33:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:43,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399868140] [2024-06-14 13:33:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:43,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:46,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:46,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399868140] [2024-06-14 13:33:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399868140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:46,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292778231] [2024-06-14 13:33:46,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:46,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:46,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 349 transitions, 4586 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:46,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:46,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:46,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:48,499 INFO L124 PetriNetUnfolderBase]: 3306/5248 cut-off events. [2024-06-14 13:33:48,499 INFO L125 PetriNetUnfolderBase]: For 625304/625304 co-relation queries the response was YES. [2024-06-14 13:33:48,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39188 conditions, 5248 events. 3306/5248 cut-off events. For 625304/625304 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31063 event pairs, 711 based on Foata normal form. 2/5248 useless extension candidates. Maximal degree in co-relation 39050. Up to 4935 conditions per place. [2024-06-14 13:33:48,558 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-14 13:33:48,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 389 transitions, 5696 flow [2024-06-14 13:33:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:33:48,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:33:48,559 INFO L175 Difference]: Start difference. First operand has 291 places, 349 transitions, 4586 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:33:48,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 389 transitions, 5696 flow [2024-06-14 13:33:49,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 389 transitions, 5596 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:49,582 INFO L231 Difference]: Finished difference. Result has 293 places, 353 transitions, 4617 flow [2024-06-14 13:33:49,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4617, PETRI_PLACES=293, PETRI_TRANSITIONS=353} [2024-06-14 13:33:49,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 248 predicate places. [2024-06-14 13:33:49,583 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 353 transitions, 4617 flow [2024-06-14 13:33:49,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:49,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:49,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:33:49,583 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)] === [2024-06-14 13:33:49,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2050484884, now seen corresponding path program 2 times [2024-06-14 13:33:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965743453] [2024-06-14 13:33:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:52,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:52,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965743453] [2024-06-14 13:33:52,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965743453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:52,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:52,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:52,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719327308] [2024-06-14 13:33:52,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:52,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:52,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:52,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:52,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 353 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:52,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:52,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:54,789 INFO L124 PetriNetUnfolderBase]: 3319/5261 cut-off events. [2024-06-14 13:33:54,790 INFO L125 PetriNetUnfolderBase]: For 637575/637575 co-relation queries the response was YES. [2024-06-14 13:33:54,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39542 conditions, 5261 events. 3319/5261 cut-off events. For 637575/637575 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31216 event pairs, 826 based on Foata normal form. 2/5261 useless extension candidates. Maximal degree in co-relation 39402. Up to 5004 conditions per place. [2024-06-14 13:33:54,846 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 354 selfloop transitions, 29 changer transitions 0/388 dead transitions. [2024-06-14 13:33:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 388 transitions, 5541 flow [2024-06-14 13:33:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:33:54,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 13:33:54,848 INFO L175 Difference]: Start difference. First operand has 293 places, 353 transitions, 4617 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:33:54,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 388 transitions, 5541 flow [2024-06-14 13:33:56,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 388 transitions, 5377 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:56,056 INFO L231 Difference]: Finished difference. Result has 297 places, 358 transitions, 4592 flow [2024-06-14 13:33:56,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4592, PETRI_PLACES=297, PETRI_TRANSITIONS=358} [2024-06-14 13:33:56,056 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 13:33:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 358 transitions, 4592 flow [2024-06-14 13:33:56,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:56,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:56,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:33:56,057 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)] === [2024-06-14 13:33:56,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -235849426, now seen corresponding path program 1 times [2024-06-14 13:33:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:56,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128090522] [2024-06-14 13:33:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:56,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128090522] [2024-06-14 13:33:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128090522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:59,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:59,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612829619] [2024-06-14 13:33:59,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:59,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:33:59,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 358 transitions, 4592 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:59,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:59,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:33:59,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:01,335 INFO L124 PetriNetUnfolderBase]: 3340/5290 cut-off events. [2024-06-14 13:34:01,335 INFO L125 PetriNetUnfolderBase]: For 654442/654442 co-relation queries the response was YES. [2024-06-14 13:34:01,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 5290 events. 3340/5290 cut-off events. For 654442/654442 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31455 event pairs, 822 based on Foata normal form. 1/5289 useless extension candidates. Maximal degree in co-relation 39905. Up to 4970 conditions per place. [2024-06-14 13:34:01,388 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 350 selfloop transitions, 49 changer transitions 0/404 dead transitions. [2024-06-14 13:34:01,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 404 transitions, 5806 flow [2024-06-14 13:34:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:34:01,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:34:01,390 INFO L175 Difference]: Start difference. First operand has 297 places, 358 transitions, 4592 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:34:01,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 404 transitions, 5806 flow [2024-06-14 13:34:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 404 transitions, 5735 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:02,597 INFO L231 Difference]: Finished difference. Result has 302 places, 364 transitions, 4770 flow [2024-06-14 13:34:02,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4770, PETRI_PLACES=302, PETRI_TRANSITIONS=364} [2024-06-14 13:34:02,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-14 13:34:02,598 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 364 transitions, 4770 flow [2024-06-14 13:34:02,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:02,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:02,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:34:02,599 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)] === [2024-06-14 13:34:02,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash -767442284, now seen corresponding path program 3 times [2024-06-14 13:34:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:02,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465772064] [2024-06-14 13:34:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:02,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465772064] [2024-06-14 13:34:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465772064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:05,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:05,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467212291] [2024-06-14 13:34:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:05,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:05,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 364 transitions, 4770 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:05,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:05,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:05,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:07,758 INFO L124 PetriNetUnfolderBase]: 3348/5306 cut-off events. [2024-06-14 13:34:07,758 INFO L125 PetriNetUnfolderBase]: For 676059/676059 co-relation queries the response was YES. [2024-06-14 13:34:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 5306 events. 3348/5306 cut-off events. For 676059/676059 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31531 event pairs, 830 based on Foata normal form. 2/5306 useless extension candidates. Maximal degree in co-relation 40712. Up to 5045 conditions per place. [2024-06-14 13:34:07,821 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 356 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-14 13:34:07,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 390 transitions, 5655 flow [2024-06-14 13:34:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:34:07,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-14 13:34:07,823 INFO L175 Difference]: Start difference. First operand has 302 places, 364 transitions, 4770 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:34:07,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 390 transitions, 5655 flow [2024-06-14 13:34:09,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 390 transitions, 5511 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:09,316 INFO L231 Difference]: Finished difference. Result has 307 places, 367 transitions, 4753 flow [2024-06-14 13:34:09,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4628, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=307, PETRI_TRANSITIONS=367} [2024-06-14 13:34:09,317 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 13:34:09,317 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 367 transitions, 4753 flow [2024-06-14 13:34:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:09,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:09,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:09,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:34:09,318 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)] === [2024-06-14 13:34:09,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1969263052, now seen corresponding path program 2 times [2024-06-14 13:34:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806473541] [2024-06-14 13:34:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806473541] [2024-06-14 13:34:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806473541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393449808] [2024-06-14 13:34:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:12,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:12,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 367 transitions, 4753 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:12,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:12,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:12,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:14,603 INFO L124 PetriNetUnfolderBase]: 3361/5330 cut-off events. [2024-06-14 13:34:14,603 INFO L125 PetriNetUnfolderBase]: For 690620/690620 co-relation queries the response was YES. [2024-06-14 13:34:14,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41295 conditions, 5330 events. 3361/5330 cut-off events. For 690620/690620 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31682 event pairs, 707 based on Foata normal form. 1/5326 useless extension candidates. Maximal degree in co-relation 41149. Up to 4445 conditions per place. [2024-06-14 13:34:14,677 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 285 selfloop transitions, 121 changer transitions 0/411 dead transitions. [2024-06-14 13:34:14,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 411 transitions, 6307 flow [2024-06-14 13:34:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:34:14,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:34:14,679 INFO L175 Difference]: Start difference. First operand has 307 places, 367 transitions, 4753 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:34:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 411 transitions, 6307 flow [2024-06-14 13:34:16,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 411 transitions, 6116 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:16,057 INFO L231 Difference]: Finished difference. Result has 310 places, 376 transitions, 5143 flow [2024-06-14 13:34:16,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4576, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=310, PETRI_TRANSITIONS=376} [2024-06-14 13:34:16,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-14 13:34:16,058 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 376 transitions, 5143 flow [2024-06-14 13:34:16,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:16,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:16,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:34:16,059 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)] === [2024-06-14 13:34:16,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -882481576, now seen corresponding path program 3 times [2024-06-14 13:34:16,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:16,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848849210] [2024-06-14 13:34:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:16,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:19,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:19,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848849210] [2024-06-14 13:34:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848849210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:19,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706360949] [2024-06-14 13:34:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:19,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:19,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 376 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:19,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:19,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:21,523 INFO L124 PetriNetUnfolderBase]: 3366/5335 cut-off events. [2024-06-14 13:34:21,523 INFO L125 PetriNetUnfolderBase]: For 707071/707071 co-relation queries the response was YES. [2024-06-14 13:34:21,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42099 conditions, 5335 events. 3366/5335 cut-off events. For 707071/707071 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31685 event pairs, 711 based on Foata normal form. 1/5331 useless extension candidates. Maximal degree in co-relation 41952. Up to 4449 conditions per place. [2024-06-14 13:34:21,583 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 123 changer transitions 0/410 dead transitions. [2024-06-14 13:34:21,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 410 transitions, 6559 flow [2024-06-14 13:34:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:34:21,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:34:21,585 INFO L175 Difference]: Start difference. First operand has 310 places, 376 transitions, 5143 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:34:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 410 transitions, 6559 flow [2024-06-14 13:34:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 410 transitions, 6364 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:22,618 INFO L231 Difference]: Finished difference. Result has 315 places, 379 transitions, 5292 flow [2024-06-14 13:34:22,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5292, PETRI_PLACES=315, PETRI_TRANSITIONS=379} [2024-06-14 13:34:22,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-14 13:34:22,619 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 379 transitions, 5292 flow [2024-06-14 13:34:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:22,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:22,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:34:22,619 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)] === [2024-06-14 13:34:22,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -762677708, now seen corresponding path program 4 times [2024-06-14 13:34:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:22,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299313147] [2024-06-14 13:34:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:25,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:25,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299313147] [2024-06-14 13:34:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299313147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:25,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:25,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:25,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997723473] [2024-06-14 13:34:25,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:25,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:25,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 379 transitions, 5292 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:25,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:25,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:25,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:27,791 INFO L124 PetriNetUnfolderBase]: 3387/5374 cut-off events. [2024-06-14 13:34:27,791 INFO L125 PetriNetUnfolderBase]: For 726875/726875 co-relation queries the response was YES. [2024-06-14 13:34:27,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42601 conditions, 5374 events. 3387/5374 cut-off events. For 726875/726875 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32044 event pairs, 833 based on Foata normal form. 1/5373 useless extension candidates. Maximal degree in co-relation 42452. Up to 5069 conditions per place. [2024-06-14 13:34:27,843 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 362 selfloop transitions, 43 changer transitions 0/410 dead transitions. [2024-06-14 13:34:27,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 410 transitions, 6487 flow [2024-06-14 13:34:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:34:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37626262626262624 [2024-06-14 13:34:27,845 INFO L175 Difference]: Start difference. First operand has 315 places, 379 transitions, 5292 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:34:27,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 410 transitions, 6487 flow [2024-06-14 13:34:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 410 transitions, 6218 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:29,245 INFO L231 Difference]: Finished difference. Result has 320 places, 385 transitions, 5265 flow [2024-06-14 13:34:29,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5265, PETRI_PLACES=320, PETRI_TRANSITIONS=385} [2024-06-14 13:34:29,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-14 13:34:29,246 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 385 transitions, 5265 flow [2024-06-14 13:34:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:29,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:29,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:34:29,246 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)] === [2024-06-14 13:34:29,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 51844427, now seen corresponding path program 1 times [2024-06-14 13:34:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825841615] [2024-06-14 13:34:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:31,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:31,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825841615] [2024-06-14 13:34:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825841615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:31,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059917467] [2024-06-14 13:34:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:32,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:32,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 385 transitions, 5265 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:32,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:32,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:32,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:34,211 INFO L124 PetriNetUnfolderBase]: 3503/5539 cut-off events. [2024-06-14 13:34:34,211 INFO L125 PetriNetUnfolderBase]: For 810010/810014 co-relation queries the response was YES. [2024-06-14 13:34:34,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44636 conditions, 5539 events. 3503/5539 cut-off events. For 810010/810014 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32945 event pairs, 733 based on Foata normal form. 8/5542 useless extension candidates. Maximal degree in co-relation 44485. Up to 4544 conditions per place. [2024-06-14 13:34:34,275 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 274 selfloop transitions, 154 changer transitions 0/433 dead transitions. [2024-06-14 13:34:34,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 433 transitions, 6807 flow [2024-06-14 13:34:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:34:34,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:34:34,277 INFO L175 Difference]: Start difference. First operand has 320 places, 385 transitions, 5265 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:34:34,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 433 transitions, 6807 flow [2024-06-14 13:34:35,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 433 transitions, 6683 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:35,915 INFO L231 Difference]: Finished difference. Result has 323 places, 397 transitions, 5667 flow [2024-06-14 13:34:35,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5667, PETRI_PLACES=323, PETRI_TRANSITIONS=397} [2024-06-14 13:34:35,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-14 13:34:35,916 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 397 transitions, 5667 flow [2024-06-14 13:34:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:35,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:35,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:34:35,916 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)] === [2024-06-14 13:34:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1894807273, now seen corresponding path program 2 times [2024-06-14 13:34:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623452143] [2024-06-14 13:34:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:38,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623452143] [2024-06-14 13:34:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623452143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:38,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:38,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:38,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679773968] [2024-06-14 13:34:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:38,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:38,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:38,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:38,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 397 transitions, 5667 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:38,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:38,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:41,430 INFO L124 PetriNetUnfolderBase]: 3555/5610 cut-off events. [2024-06-14 13:34:41,431 INFO L125 PetriNetUnfolderBase]: For 850408/850408 co-relation queries the response was YES. [2024-06-14 13:34:41,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46259 conditions, 5610 events. 3555/5610 cut-off events. For 850408/850408 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33387 event pairs, 751 based on Foata normal form. 4/5609 useless extension candidates. Maximal degree in co-relation 46107. Up to 4584 conditions per place. [2024-06-14 13:34:41,492 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 154 changer transitions 0/441 dead transitions. [2024-06-14 13:34:41,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 441 transitions, 7151 flow [2024-06-14 13:34:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:34:41,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 13:34:41,493 INFO L175 Difference]: Start difference. First operand has 323 places, 397 transitions, 5667 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:34:41,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 441 transitions, 7151 flow [2024-06-14 13:34:43,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 441 transitions, 6949 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:43,622 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 5909 flow [2024-06-14 13:34:43,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-14 13:34:43,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-14 13:34:43,623 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 5909 flow [2024-06-14 13:34:43,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:43,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:43,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:43,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:34:43,624 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)] === [2024-06-14 13:34:43,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -882468897, now seen corresponding path program 3 times [2024-06-14 13:34:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:43,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3262305] [2024-06-14 13:34:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3262305] [2024-06-14 13:34:46,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3262305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:46,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:46,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:46,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648417926] [2024-06-14 13:34:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:46,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:46,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:46,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:46,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 5909 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:46,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:46,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:46,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:49,344 INFO L124 PetriNetUnfolderBase]: 3543/5596 cut-off events. [2024-06-14 13:34:49,345 INFO L125 PetriNetUnfolderBase]: For 851093/851093 co-relation queries the response was YES. [2024-06-14 13:34:49,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 5596 events. 3543/5596 cut-off events. For 851093/851093 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33373 event pairs, 754 based on Foata normal form. 4/5595 useless extension candidates. Maximal degree in co-relation 45817. Up to 4576 conditions per place. [2024-06-14 13:34:49,399 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 283 selfloop transitions, 155 changer transitions 0/443 dead transitions. [2024-06-14 13:34:49,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 443 transitions, 7081 flow [2024-06-14 13:34:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:34:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:34:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:34:49,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462809917355374 [2024-06-14 13:34:49,401 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 5909 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:34:49,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 443 transitions, 7081 flow [2024-06-14 13:34:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 443 transitions, 6707 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:51,408 INFO L231 Difference]: Finished difference. Result has 333 places, 403 transitions, 5851 flow [2024-06-14 13:34:51,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5851, PETRI_PLACES=333, PETRI_TRANSITIONS=403} [2024-06-14 13:34:51,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 13:34:51,409 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 403 transitions, 5851 flow [2024-06-14 13:34:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:51,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:51,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:51,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:34:51,409 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)] === [2024-06-14 13:34:51,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash -762670609, now seen corresponding path program 4 times [2024-06-14 13:34:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:51,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692405885] [2024-06-14 13:34:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:51,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:54,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:54,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692405885] [2024-06-14 13:34:54,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692405885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:54,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:54,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:54,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164647193] [2024-06-14 13:34:54,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:54,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:54,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:54,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:34:54,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 403 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:54,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:54,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:34:54,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:56,215 INFO L124 PetriNetUnfolderBase]: 3583/5642 cut-off events. [2024-06-14 13:34:56,215 INFO L125 PetriNetUnfolderBase]: For 885157/885157 co-relation queries the response was YES. [2024-06-14 13:34:56,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46247 conditions, 5642 events. 3583/5642 cut-off events. For 885157/885157 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33517 event pairs, 788 based on Foata normal form. 8/5648 useless extension candidates. Maximal degree in co-relation 46093. Up to 5185 conditions per place. [2024-06-14 13:34:56,285 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 366 selfloop transitions, 72 changer transitions 0/443 dead transitions. [2024-06-14 13:34:56,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 443 transitions, 7137 flow [2024-06-14 13:34:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:34:56,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:34:56,286 INFO L175 Difference]: Start difference. First operand has 333 places, 403 transitions, 5851 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:34:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 443 transitions, 7137 flow [2024-06-14 13:34:58,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 443 transitions, 6809 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:34:58,451 INFO L231 Difference]: Finished difference. Result has 332 places, 409 transitions, 5763 flow [2024-06-14 13:34:58,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5763, PETRI_PLACES=332, PETRI_TRANSITIONS=409} [2024-06-14 13:34:58,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 13:34:58,452 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 409 transitions, 5763 flow [2024-06-14 13:34:58,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:58,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:58,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:58,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:34:58,452 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)] === [2024-06-14 13:34:58,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash -755313379, now seen corresponding path program 5 times [2024-06-14 13:34:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:58,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574718036] [2024-06-14 13:34:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574718036] [2024-06-14 13:35:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574718036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:01,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:01,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949639511] [2024-06-14 13:35:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:01,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 409 transitions, 5763 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:01,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:01,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:03,721 INFO L124 PetriNetUnfolderBase]: 3559/5614 cut-off events. [2024-06-14 13:35:03,721 INFO L125 PetriNetUnfolderBase]: For 859516/859516 co-relation queries the response was YES. [2024-06-14 13:35:03,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45032 conditions, 5614 events. 3559/5614 cut-off events. For 859516/859516 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33474 event pairs, 810 based on Foata normal form. 8/5620 useless extension candidates. Maximal degree in co-relation 44877. Up to 5169 conditions per place. [2024-06-14 13:35:03,782 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 363 selfloop transitions, 75 changer transitions 0/443 dead transitions. [2024-06-14 13:35:03,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 443 transitions, 6767 flow [2024-06-14 13:35:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:35:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-14 13:35:03,784 INFO L175 Difference]: Start difference. First operand has 332 places, 409 transitions, 5763 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:35:03,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 443 transitions, 6767 flow [2024-06-14 13:35:05,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 443 transitions, 6603 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:05,806 INFO L231 Difference]: Finished difference. Result has 335 places, 409 transitions, 5761 flow [2024-06-14 13:35:05,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5761, PETRI_PLACES=335, PETRI_TRANSITIONS=409} [2024-06-14 13:35:05,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-14 13:35:05,806 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 409 transitions, 5761 flow [2024-06-14 13:35:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:05,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:05,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:35:05,807 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)] === [2024-06-14 13:35:05,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1542713738, now seen corresponding path program 4 times [2024-06-14 13:35:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385217362] [2024-06-14 13:35:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385217362] [2024-06-14 13:35:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385217362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:08,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905149629] [2024-06-14 13:35:08,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:08,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:08,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:08,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 409 transitions, 5761 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:08,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:08,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:11,120 INFO L124 PetriNetUnfolderBase]: 3554/5591 cut-off events. [2024-06-14 13:35:11,120 INFO L125 PetriNetUnfolderBase]: For 835841/835841 co-relation queries the response was YES. [2024-06-14 13:35:11,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 5591 events. 3554/5591 cut-off events. For 835841/835841 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33276 event pairs, 883 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 44739. Up to 5332 conditions per place. [2024-06-14 13:35:11,178 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 390 selfloop transitions, 29 changer transitions 0/424 dead transitions. [2024-06-14 13:35:11,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 424 transitions, 6641 flow [2024-06-14 13:35:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:35:11,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2024-06-14 13:35:11,179 INFO L175 Difference]: Start difference. First operand has 335 places, 409 transitions, 5761 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:35:11,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 424 transitions, 6641 flow [2024-06-14 13:35:13,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 424 transitions, 6445 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:35:13,164 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 5628 flow [2024-06-14 13:35:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5628, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-14 13:35:13,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 13:35:13,165 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 5628 flow [2024-06-14 13:35:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:13,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:13,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:13,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:35:13,165 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)] === [2024-06-14 13:35:13,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash -244767180, now seen corresponding path program 5 times [2024-06-14 13:35:13,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:13,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678545545] [2024-06-14 13:35:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:13,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:16,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:16,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678545545] [2024-06-14 13:35:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678545545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:16,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978084336] [2024-06-14 13:35:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:16,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:16,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:16,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 5628 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:16,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:16,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:16,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:18,466 INFO L124 PetriNetUnfolderBase]: 3559/5599 cut-off events. [2024-06-14 13:35:18,466 INFO L125 PetriNetUnfolderBase]: For 847004/847004 co-relation queries the response was YES. [2024-06-14 13:35:18,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44927 conditions, 5599 events. 3559/5599 cut-off events. For 847004/847004 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33359 event pairs, 859 based on Foata normal form. 1/5572 useless extension candidates. Maximal degree in co-relation 44770. Up to 4705 conditions per place. [2024-06-14 13:35:18,538 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 299 selfloop transitions, 141 changer transitions 0/445 dead transitions. [2024-06-14 13:35:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 445 transitions, 7392 flow [2024-06-14 13:35:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:35:18,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:35:18,540 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 5628 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:35:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 445 transitions, 7392 flow [2024-06-14 13:35:20,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 445 transitions, 7259 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:35:20,712 INFO L231 Difference]: Finished difference. Result has 332 places, 415 transitions, 5977 flow [2024-06-14 13:35:20,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5495, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5977, PETRI_PLACES=332, PETRI_TRANSITIONS=415} [2024-06-14 13:35:20,713 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 13:35:20,713 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 415 transitions, 5977 flow [2024-06-14 13:35:20,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:20,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:20,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:20,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:35:20,713 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)] === [2024-06-14 13:35:20,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:20,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1621357098, now seen corresponding path program 6 times [2024-06-14 13:35:20,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:20,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854783775] [2024-06-14 13:35:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:23,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:23,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854783775] [2024-06-14 13:35:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854783775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:23,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:23,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967261570] [2024-06-14 13:35:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:23,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:23,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 415 transitions, 5977 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:26,150 INFO L124 PetriNetUnfolderBase]: 3564/5608 cut-off events. [2024-06-14 13:35:26,150 INFO L125 PetriNetUnfolderBase]: For 866435/866435 co-relation queries the response was YES. [2024-06-14 13:35:26,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45443 conditions, 5608 events. 3564/5608 cut-off events. For 866435/866435 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33431 event pairs, 859 based on Foata normal form. 1/5581 useless extension candidates. Maximal degree in co-relation 45287. Up to 4709 conditions per place. [2024-06-14 13:35:26,219 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 298 selfloop transitions, 142 changer transitions 0/445 dead transitions. [2024-06-14 13:35:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 445 transitions, 7649 flow [2024-06-14 13:35:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:35:26,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 13:35:26,221 INFO L175 Difference]: Start difference. First operand has 332 places, 415 transitions, 5977 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:35:26,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 445 transitions, 7649 flow [2024-06-14 13:35:28,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 445 transitions, 7410 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:28,350 INFO L231 Difference]: Finished difference. Result has 336 places, 418 transitions, 6130 flow [2024-06-14 13:35:28,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5772, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6130, PETRI_PLACES=336, PETRI_TRANSITIONS=418} [2024-06-14 13:35:28,351 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-14 13:35:28,351 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 418 transitions, 6130 flow [2024-06-14 13:35:28,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:28,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:28,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:28,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:35:28,351 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)] === [2024-06-14 13:35:28,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1221859788, now seen corresponding path program 7 times [2024-06-14 13:35:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:28,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635536365] [2024-06-14 13:35:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635536365] [2024-06-14 13:35:31,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635536365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:31,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:31,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:31,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876606006] [2024-06-14 13:35:31,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:31,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:31,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 418 transitions, 6130 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:31,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:31,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:33,847 INFO L124 PetriNetUnfolderBase]: 3569/5621 cut-off events. [2024-06-14 13:35:33,848 INFO L125 PetriNetUnfolderBase]: For 882484/882484 co-relation queries the response was YES. [2024-06-14 13:35:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45906 conditions, 5621 events. 3569/5621 cut-off events. For 882484/882484 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33544 event pairs, 859 based on Foata normal form. 1/5594 useless extension candidates. Maximal degree in co-relation 45748. Up to 4713 conditions per place. [2024-06-14 13:35:33,919 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 289 selfloop transitions, 148 changer transitions 0/442 dead transitions. [2024-06-14 13:35:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 442 transitions, 7548 flow [2024-06-14 13:35:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:35:33,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-14 13:35:33,921 INFO L175 Difference]: Start difference. First operand has 336 places, 418 transitions, 6130 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:35:33,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 442 transitions, 7548 flow [2024-06-14 13:35:36,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 442 transitions, 7232 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:36,476 INFO L231 Difference]: Finished difference. Result has 339 places, 421 transitions, 6190 flow [2024-06-14 13:35:36,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6190, PETRI_PLACES=339, PETRI_TRANSITIONS=421} [2024-06-14 13:35:36,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 13:35:36,477 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 421 transitions, 6190 flow [2024-06-14 13:35:36,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:36,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:36,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:36,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:35:36,478 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)] === [2024-06-14 13:35:36,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:36,478 INFO L85 PathProgramCache]: Analyzing trace with hash 717562444, now seen corresponding path program 8 times [2024-06-14 13:35:36,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:36,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794187163] [2024-06-14 13:35:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:36,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794187163] [2024-06-14 13:35:39,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794187163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:39,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887253348] [2024-06-14 13:35:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 421 transitions, 6190 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:39,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:41,899 INFO L124 PetriNetUnfolderBase]: 3582/5648 cut-off events. [2024-06-14 13:35:41,899 INFO L125 PetriNetUnfolderBase]: For 902641/902641 co-relation queries the response was YES. [2024-06-14 13:35:41,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46310 conditions, 5648 events. 3582/5648 cut-off events. For 902641/902641 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33784 event pairs, 882 based on Foata normal form. 1/5639 useless extension candidates. Maximal degree in co-relation 46151. Up to 5274 conditions per place. [2024-06-14 13:35:41,965 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 367 selfloop transitions, 70 changer transitions 0/442 dead transitions. [2024-06-14 13:35:41,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 442 transitions, 7597 flow [2024-06-14 13:35:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:35:41,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:35:41,967 INFO L175 Difference]: Start difference. First operand has 339 places, 421 transitions, 6190 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:35:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 442 transitions, 7597 flow [2024-06-14 13:35:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 442 transitions, 7254 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:44,662 INFO L231 Difference]: Finished difference. Result has 344 places, 424 transitions, 6097 flow [2024-06-14 13:35:44,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6097, PETRI_PLACES=344, PETRI_TRANSITIONS=424} [2024-06-14 13:35:44,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-14 13:35:44,662 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 424 transitions, 6097 flow [2024-06-14 13:35:44,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:44,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:44,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:35:44,663 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)] === [2024-06-14 13:35:44,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2064027366, now seen corresponding path program 9 times [2024-06-14 13:35:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197828397] [2024-06-14 13:35:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:47,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197828397] [2024-06-14 13:35:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197828397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:47,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:47,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:47,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637757950] [2024-06-14 13:35:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:47,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:47,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:47,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 424 transitions, 6097 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:47,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:47,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:49,944 INFO L124 PetriNetUnfolderBase]: 3579/5642 cut-off events. [2024-06-14 13:35:49,944 INFO L125 PetriNetUnfolderBase]: For 911457/911457 co-relation queries the response was YES. [2024-06-14 13:35:49,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46023 conditions, 5642 events. 3579/5642 cut-off events. For 911457/911457 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33692 event pairs, 878 based on Foata normal form. 1/5633 useless extension candidates. Maximal degree in co-relation 45862. Up to 5272 conditions per place. [2024-06-14 13:35:50,007 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 373 selfloop transitions, 66 changer transitions 0/444 dead transitions. [2024-06-14 13:35:50,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 444 transitions, 7447 flow [2024-06-14 13:35:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:35:50,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:35:50,010 INFO L175 Difference]: Start difference. First operand has 344 places, 424 transitions, 6097 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:35:50,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 444 transitions, 7447 flow [2024-06-14 13:35:52,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 444 transitions, 7207 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 13:35:52,639 INFO L231 Difference]: Finished difference. Result has 346 places, 424 transitions, 5995 flow [2024-06-14 13:35:52,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5995, PETRI_PLACES=346, PETRI_TRANSITIONS=424} [2024-06-14 13:35:52,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-14 13:35:52,639 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 424 transitions, 5995 flow [2024-06-14 13:35:52,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:52,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:52,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:35:52,644 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)] === [2024-06-14 13:35:52,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 710254639, now seen corresponding path program 6 times [2024-06-14 13:35:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:52,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104859802] [2024-06-14 13:35:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:55,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:55,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104859802] [2024-06-14 13:35:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104859802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:55,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:55,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715676418] [2024-06-14 13:35:55,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:55,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:55,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:35:55,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 424 transitions, 5995 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:55,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:55,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:35:55,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:57,455 INFO L124 PetriNetUnfolderBase]: 3599/5679 cut-off events. [2024-06-14 13:35:57,455 INFO L125 PetriNetUnfolderBase]: For 942213/942225 co-relation queries the response was YES. [2024-06-14 13:35:57,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46261 conditions, 5679 events. 3599/5679 cut-off events. For 942213/942225 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33899 event pairs, 770 based on Foata normal form. 12/5679 useless extension candidates. Maximal degree in co-relation 46099. Up to 4640 conditions per place. [2024-06-14 13:35:57,531 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 292 selfloop transitions, 163 changer transitions 0/460 dead transitions. [2024-06-14 13:35:57,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 460 transitions, 7497 flow [2024-06-14 13:35:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:35:57,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:35:57,532 INFO L175 Difference]: Start difference. First operand has 346 places, 424 transitions, 5995 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:35:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 460 transitions, 7497 flow [2024-06-14 13:36:00,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 460 transitions, 7287 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 13:36:00,215 INFO L231 Difference]: Finished difference. Result has 343 places, 428 transitions, 6199 flow [2024-06-14 13:36:00,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6199, PETRI_PLACES=343, PETRI_TRANSITIONS=428} [2024-06-14 13:36:00,216 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 13:36:00,216 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 428 transitions, 6199 flow [2024-06-14 13:36:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:00,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:00,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:00,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:36:00,217 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:00,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash 479083075, now seen corresponding path program 7 times [2024-06-14 13:36:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:00,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853045752] [2024-06-14 13:36:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:00,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853045752] [2024-06-14 13:36:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853045752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:03,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:03,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583343255] [2024-06-14 13:36:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:03,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:03,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 428 transitions, 6199 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:03,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:03,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:03,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:05,314 INFO L124 PetriNetUnfolderBase]: 3651/5769 cut-off events. [2024-06-14 13:36:05,315 INFO L125 PetriNetUnfolderBase]: For 986674/986686 co-relation queries the response was YES. [2024-06-14 13:36:05,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47874 conditions, 5769 events. 3651/5769 cut-off events. For 986674/986686 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34660 event pairs, 788 based on Foata normal form. 12/5769 useless extension candidates. Maximal degree in co-relation 47712. Up to 4680 conditions per place. [2024-06-14 13:36:05,386 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 168 changer transitions 0/463 dead transitions. [2024-06-14 13:36:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 463 transitions, 7749 flow [2024-06-14 13:36:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:36:05,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:36:05,388 INFO L175 Difference]: Start difference. First operand has 343 places, 428 transitions, 6199 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:36:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 463 transitions, 7749 flow [2024-06-14 13:36:08,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 463 transitions, 7453 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:08,058 INFO L231 Difference]: Finished difference. Result has 347 places, 434 transitions, 6377 flow [2024-06-14 13:36:08,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6377, PETRI_PLACES=347, PETRI_TRANSITIONS=434} [2024-06-14 13:36:08,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-14 13:36:08,059 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 434 transitions, 6377 flow [2024-06-14 13:36:08,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:08,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:08,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:36:08,060 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:08,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1608864333, now seen corresponding path program 8 times [2024-06-14 13:36:08,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:08,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113993839] [2024-06-14 13:36:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:10,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:10,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113993839] [2024-06-14 13:36:10,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113993839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:10,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378665045] [2024-06-14 13:36:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:10,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:11,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:11,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 434 transitions, 6377 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:11,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:11,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:11,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:13,356 INFO L124 PetriNetUnfolderBase]: 3639/5750 cut-off events. [2024-06-14 13:36:13,357 INFO L125 PetriNetUnfolderBase]: For 983724/983727 co-relation queries the response was YES. [2024-06-14 13:36:13,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47327 conditions, 5750 events. 3639/5750 cut-off events. For 983724/983727 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34514 event pairs, 771 based on Foata normal form. 6/5753 useless extension candidates. Maximal degree in co-relation 47163. Up to 5362 conditions per place. [2024-06-14 13:36:13,418 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 411 selfloop transitions, 43 changer transitions 0/459 dead transitions. [2024-06-14 13:36:13,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 459 transitions, 7347 flow [2024-06-14 13:36:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:36:13,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-14 13:36:13,436 INFO L175 Difference]: Start difference. First operand has 347 places, 434 transitions, 6377 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:36:13,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 459 transitions, 7347 flow [2024-06-14 13:36:15,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 459 transitions, 7066 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:15,638 INFO L231 Difference]: Finished difference. Result has 351 places, 434 transitions, 6188 flow [2024-06-14 13:36:15,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6188, PETRI_PLACES=351, PETRI_TRANSITIONS=434} [2024-06-14 13:36:15,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-14 13:36:15,638 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 434 transitions, 6188 flow [2024-06-14 13:36:15,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:15,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:15,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:36:15,639 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:15,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash -247027783, now seen corresponding path program 9 times [2024-06-14 13:36:15,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:15,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618665216] [2024-06-14 13:36:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:15,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:18,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618665216] [2024-06-14 13:36:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618665216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:18,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486163228] [2024-06-14 13:36:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:18,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:18,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 434 transitions, 6188 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:18,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:18,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:18,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:21,158 INFO L124 PetriNetUnfolderBase]: 3691/5815 cut-off events. [2024-06-14 13:36:21,159 INFO L125 PetriNetUnfolderBase]: For 1023409/1023409 co-relation queries the response was YES. [2024-06-14 13:36:21,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47845 conditions, 5815 events. 3691/5815 cut-off events. For 1023409/1023409 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34747 event pairs, 916 based on Foata normal form. 4/5802 useless extension candidates. Maximal degree in co-relation 47680. Up to 4712 conditions per place. [2024-06-14 13:36:21,230 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 286 selfloop transitions, 183 changer transitions 0/474 dead transitions. [2024-06-14 13:36:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 474 transitions, 7778 flow [2024-06-14 13:36:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:36:21,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-14 13:36:21,232 INFO L175 Difference]: Start difference. First operand has 351 places, 434 transitions, 6188 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:36:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 474 transitions, 7778 flow [2024-06-14 13:36:24,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 474 transitions, 7667 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:24,311 INFO L231 Difference]: Finished difference. Result has 353 places, 440 transitions, 6575 flow [2024-06-14 13:36:24,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6575, PETRI_PLACES=353, PETRI_TRANSITIONS=440} [2024-06-14 13:36:24,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-14 13:36:24,311 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 440 transitions, 6575 flow [2024-06-14 13:36:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:24,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:24,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:36:24,313 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:24,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash -234278981, now seen corresponding path program 10 times [2024-06-14 13:36:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:24,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899580568] [2024-06-14 13:36:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:27,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899580568] [2024-06-14 13:36:27,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899580568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:27,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:27,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030563831] [2024-06-14 13:36:27,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:27,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:27,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:27,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:27,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 440 transitions, 6575 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:27,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:27,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:27,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:30,116 INFO L124 PetriNetUnfolderBase]: 3679/5807 cut-off events. [2024-06-14 13:36:30,116 INFO L125 PetriNetUnfolderBase]: For 1020992/1020992 co-relation queries the response was YES. [2024-06-14 13:36:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48064 conditions, 5807 events. 3679/5807 cut-off events. For 1020992/1020992 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34872 event pairs, 910 based on Foata normal form. 4/5794 useless extension candidates. Maximal degree in co-relation 47898. Up to 4704 conditions per place. [2024-06-14 13:36:30,192 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 287 selfloop transitions, 184 changer transitions 0/476 dead transitions. [2024-06-14 13:36:30,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 476 transitions, 7831 flow [2024-06-14 13:36:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:36:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:36:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:36:30,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822314049586777 [2024-06-14 13:36:30,193 INFO L175 Difference]: Start difference. First operand has 353 places, 440 transitions, 6575 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:36:30,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 476 transitions, 7831 flow [2024-06-14 13:36:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 476 transitions, 7399 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:33,193 INFO L231 Difference]: Finished difference. Result has 358 places, 440 transitions, 6517 flow [2024-06-14 13:36:33,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6517, PETRI_PLACES=358, PETRI_TRANSITIONS=440} [2024-06-14 13:36:33,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-14 13:36:33,193 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 440 transitions, 6517 flow [2024-06-14 13:36:33,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:33,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:33,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:33,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:36:33,194 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:33,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -980344593, now seen corresponding path program 11 times [2024-06-14 13:36:33,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:33,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254476693] [2024-06-14 13:36:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:36,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254476693] [2024-06-14 13:36:36,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254476693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:36,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:36,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:36,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084065317] [2024-06-14 13:36:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:36,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:36,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 440 transitions, 6517 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:36,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:36,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:36,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:39,402 INFO L124 PetriNetUnfolderBase]: 3763/5921 cut-off events. [2024-06-14 13:36:39,402 INFO L125 PetriNetUnfolderBase]: For 1088827/1088827 co-relation queries the response was YES. [2024-06-14 13:36:39,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49797 conditions, 5921 events. 3763/5921 cut-off events. For 1088827/1088827 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35453 event pairs, 874 based on Foata normal form. 4/5908 useless extension candidates. Maximal degree in co-relation 49630. Up to 4768 conditions per place. [2024-06-14 13:36:39,478 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 288 selfloop transitions, 195 changer transitions 0/488 dead transitions. [2024-06-14 13:36:39,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 488 transitions, 8445 flow [2024-06-14 13:36:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:36:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:36:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-14 13:36:39,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38446969696969696 [2024-06-14 13:36:39,480 INFO L175 Difference]: Start difference. First operand has 358 places, 440 transitions, 6517 flow. Second operand 12 states and 203 transitions. [2024-06-14 13:36:39,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 488 transitions, 8445 flow [2024-06-14 13:36:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 488 transitions, 8190 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:42,408 INFO L231 Difference]: Finished difference. Result has 362 places, 449 transitions, 6860 flow [2024-06-14 13:36:42,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6860, PETRI_PLACES=362, PETRI_TRANSITIONS=449} [2024-06-14 13:36:42,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-14 13:36:42,408 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 449 transitions, 6860 flow [2024-06-14 13:36:42,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:42,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:42,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:36:42,409 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:42,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1221852689, now seen corresponding path program 12 times [2024-06-14 13:36:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190145091] [2024-06-14 13:36:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190145091] [2024-06-14 13:36:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190145091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:45,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:45,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699295330] [2024-06-14 13:36:45,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:45,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:45,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 449 transitions, 6860 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:45,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:45,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:45,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:48,768 INFO L124 PetriNetUnfolderBase]: 3751/5907 cut-off events. [2024-06-14 13:36:48,769 INFO L125 PetriNetUnfolderBase]: For 1087496/1087496 co-relation queries the response was YES. [2024-06-14 13:36:48,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49509 conditions, 5907 events. 3751/5907 cut-off events. For 1087496/1087496 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35406 event pairs, 876 based on Foata normal form. 4/5894 useless extension candidates. Maximal degree in co-relation 49340. Up to 4760 conditions per place. [2024-06-14 13:36:48,843 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 288 selfloop transitions, 193 changer transitions 0/486 dead transitions. [2024-06-14 13:36:48,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 486 transitions, 8584 flow [2024-06-14 13:36:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:36:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:36:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:36:48,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462809917355374 [2024-06-14 13:36:48,844 INFO L175 Difference]: Start difference. First operand has 362 places, 449 transitions, 6860 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:36:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 486 transitions, 8584 flow [2024-06-14 13:36:51,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 486 transitions, 7926 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-06-14 13:36:51,710 INFO L231 Difference]: Finished difference. Result has 364 places, 449 transitions, 6594 flow [2024-06-14 13:36:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6594, PETRI_PLACES=364, PETRI_TRANSITIONS=449} [2024-06-14 13:36:51,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-14 13:36:51,710 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 449 transitions, 6594 flow [2024-06-14 13:36:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:51,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:36:51,711 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:51,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1213578479, now seen corresponding path program 13 times [2024-06-14 13:36:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687641181] [2024-06-14 13:36:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687641181] [2024-06-14 13:36:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687641181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:54,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637633047] [2024-06-14 13:36:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:55,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:36:55,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 449 transitions, 6594 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:55,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:55,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:36:55,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:57,510 INFO L124 PetriNetUnfolderBase]: 3739/5889 cut-off events. [2024-06-14 13:36:57,511 INFO L125 PetriNetUnfolderBase]: For 1071179/1071179 co-relation queries the response was YES. [2024-06-14 13:36:57,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48655 conditions, 5889 events. 3739/5889 cut-off events. For 1071179/1071179 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 35318 event pairs, 882 based on Foata normal form. 4/5876 useless extension candidates. Maximal degree in co-relation 48486. Up to 4752 conditions per place. [2024-06-14 13:36:57,578 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 284 selfloop transitions, 194 changer transitions 0/483 dead transitions. [2024-06-14 13:36:57,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 483 transitions, 8352 flow [2024-06-14 13:36:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:36:57,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 13:36:57,579 INFO L175 Difference]: Start difference. First operand has 364 places, 449 transitions, 6594 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:36:57,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 483 transitions, 8352 flow [2024-06-14 13:37:00,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 483 transitions, 7946 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:00,381 INFO L231 Difference]: Finished difference. Result has 367 places, 451 transitions, 6613 flow [2024-06-14 13:37:00,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6613, PETRI_PLACES=367, PETRI_TRANSITIONS=451} [2024-06-14 13:37:00,382 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 13:37:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 451 transitions, 6613 flow [2024-06-14 13:37:00,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:00,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:37:00,383 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:00,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:00,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1213133009, now seen corresponding path program 14 times [2024-06-14 13:37:00,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:00,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404669328] [2024-06-14 13:37:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:00,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404669328] [2024-06-14 13:37:03,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404669328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:03,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:03,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183695339] [2024-06-14 13:37:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:03,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 451 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:03,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:03,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:06,202 INFO L124 PetriNetUnfolderBase]: 3779/5945 cut-off events. [2024-06-14 13:37:06,202 INFO L125 PetriNetUnfolderBase]: For 1089158/1089158 co-relation queries the response was YES. [2024-06-14 13:37:06,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48453 conditions, 5945 events. 3779/5945 cut-off events. For 1089158/1089158 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35673 event pairs, 1017 based on Foata normal form. 4/5945 useless extension candidates. Maximal degree in co-relation 48283. Up to 5546 conditions per place. [2024-06-14 13:37:06,270 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 430 selfloop transitions, 49 changer transitions 0/484 dead transitions. [2024-06-14 13:37:06,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 484 transitions, 7731 flow [2024-06-14 13:37:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:37:06,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:37:06,271 INFO L175 Difference]: Start difference. First operand has 367 places, 451 transitions, 6613 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:37:06,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 484 transitions, 7731 flow [2024-06-14 13:37:09,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 484 transitions, 7329 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:09,270 INFO L231 Difference]: Finished difference. Result has 368 places, 457 transitions, 6417 flow [2024-06-14 13:37:09,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6223, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6417, PETRI_PLACES=368, PETRI_TRANSITIONS=457} [2024-06-14 13:37:09,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 13:37:09,270 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 457 transitions, 6417 flow [2024-06-14 13:37:09,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:09,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:09,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:09,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:37:09,271 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:09,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1208037539, now seen corresponding path program 15 times [2024-06-14 13:37:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:09,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756551977] [2024-06-14 13:37:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756551977] [2024-06-14 13:37:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756551977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:12,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:12,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223651918] [2024-06-14 13:37:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:12,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:12,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:12,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 457 transitions, 6417 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:12,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:12,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:12,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:14,903 INFO L124 PetriNetUnfolderBase]: 3767/5931 cut-off events. [2024-06-14 13:37:14,904 INFO L125 PetriNetUnfolderBase]: For 1075399/1075399 co-relation queries the response was YES. [2024-06-14 13:37:14,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47430 conditions, 5931 events. 3767/5931 cut-off events. For 1075399/1075399 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35623 event pairs, 997 based on Foata normal form. 4/5931 useless extension candidates. Maximal degree in co-relation 47259. Up to 5478 conditions per place. [2024-06-14 13:37:14,980 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 424 selfloop transitions, 59 changer transitions 0/488 dead transitions. [2024-06-14 13:37:14,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 488 transitions, 7685 flow [2024-06-14 13:37:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:37:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:37:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-14 13:37:14,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36983471074380164 [2024-06-14 13:37:14,982 INFO L175 Difference]: Start difference. First operand has 368 places, 457 transitions, 6417 flow. Second operand 11 states and 179 transitions. [2024-06-14 13:37:14,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 488 transitions, 7685 flow [2024-06-14 13:37:17,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 488 transitions, 7569 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:17,744 INFO L231 Difference]: Finished difference. Result has 373 places, 457 transitions, 6425 flow [2024-06-14 13:37:17,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6301, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6425, PETRI_PLACES=373, PETRI_TRANSITIONS=457} [2024-06-14 13:37:17,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-14 13:37:17,745 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 457 transitions, 6425 flow [2024-06-14 13:37:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:17,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:37:17,745 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:17,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 890994259, now seen corresponding path program 16 times [2024-06-14 13:37:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264710828] [2024-06-14 13:37:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:17,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264710828] [2024-06-14 13:37:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264710828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:20,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:20,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580287009] [2024-06-14 13:37:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:20,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:20,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:20,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 457 transitions, 6425 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:20,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:20,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:20,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:23,683 INFO L124 PetriNetUnfolderBase]: 3755/5915 cut-off events. [2024-06-14 13:37:23,684 INFO L125 PetriNetUnfolderBase]: For 1066225/1066225 co-relation queries the response was YES. [2024-06-14 13:37:23,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47025 conditions, 5915 events. 3755/5915 cut-off events. For 1066225/1066225 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35530 event pairs, 1001 based on Foata normal form. 4/5915 useless extension candidates. Maximal degree in co-relation 46853. Up to 5470 conditions per place. [2024-06-14 13:37:23,758 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 429 selfloop transitions, 59 changer transitions 0/493 dead transitions. [2024-06-14 13:37:23,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 493 transitions, 7483 flow [2024-06-14 13:37:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:37:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:37:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-14 13:37:23,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36013986013986016 [2024-06-14 13:37:23,760 INFO L175 Difference]: Start difference. First operand has 373 places, 457 transitions, 6425 flow. Second operand 13 states and 206 transitions. [2024-06-14 13:37:23,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 493 transitions, 7483 flow [2024-06-14 13:37:26,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 493 transitions, 7147 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-14 13:37:26,717 INFO L231 Difference]: Finished difference. Result has 373 places, 457 transitions, 6213 flow [2024-06-14 13:37:26,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6213, PETRI_PLACES=373, PETRI_TRANSITIONS=457} [2024-06-14 13:37:26,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-14 13:37:26,717 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 457 transitions, 6213 flow [2024-06-14 13:37:26,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:26,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:26,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:26,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:37:26,718 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:26,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:26,719 INFO L85 PathProgramCache]: Analyzing trace with hash 587162431, now seen corresponding path program 17 times [2024-06-14 13:37:26,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:26,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195584340] [2024-06-14 13:37:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:26,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195584340] [2024-06-14 13:37:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195584340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039243021] [2024-06-14 13:37:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:29,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:29,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 457 transitions, 6213 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:29,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:29,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:29,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:31,904 INFO L124 PetriNetUnfolderBase]: 3743/5906 cut-off events. [2024-06-14 13:37:31,905 INFO L125 PetriNetUnfolderBase]: For 1052212/1052212 co-relation queries the response was YES. [2024-06-14 13:37:31,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46197 conditions, 5906 events. 3743/5906 cut-off events. For 1052212/1052212 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35649 event pairs, 1069 based on Foata normal form. 4/5908 useless extension candidates. Maximal degree in co-relation 46028. Up to 5538 conditions per place. [2024-06-14 13:37:31,984 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 435 selfloop transitions, 40 changer transitions 0/480 dead transitions. [2024-06-14 13:37:31,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 480 transitions, 7449 flow [2024-06-14 13:37:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:37:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:37:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:37:31,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-06-14 13:37:31,985 INFO L175 Difference]: Start difference. First operand has 373 places, 457 transitions, 6213 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:37:31,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 480 transitions, 7449 flow [2024-06-14 13:37:34,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 480 transitions, 7293 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-14 13:37:34,270 INFO L231 Difference]: Finished difference. Result has 369 places, 457 transitions, 6145 flow [2024-06-14 13:37:34,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6145, PETRI_PLACES=369, PETRI_TRANSITIONS=457} [2024-06-14 13:37:34,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-14 13:37:34,271 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 457 transitions, 6145 flow [2024-06-14 13:37:34,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:34,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:34,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:37:34,272 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:34,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1873067797, now seen corresponding path program 18 times [2024-06-14 13:37:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:34,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779635143] [2024-06-14 13:37:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:34,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779635143] [2024-06-14 13:37:37,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779635143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:37,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822668724] [2024-06-14 13:37:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:37,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:37,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:37,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 457 transitions, 6145 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:37,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:37,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:37,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:39,762 INFO L124 PetriNetUnfolderBase]: 3783/5966 cut-off events. [2024-06-14 13:37:39,763 INFO L125 PetriNetUnfolderBase]: For 1070556/1070556 co-relation queries the response was YES. [2024-06-14 13:37:39,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46628 conditions, 5966 events. 3783/5966 cut-off events. For 1070556/1070556 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36108 event pairs, 1073 based on Foata normal form. 4/5968 useless extension candidates. Maximal degree in co-relation 46458. Up to 5562 conditions per place. [2024-06-14 13:37:39,831 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 439 selfloop transitions, 48 changer transitions 0/492 dead transitions. [2024-06-14 13:37:39,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 492 transitions, 7545 flow [2024-06-14 13:37:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:37:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:37:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-14 13:37:39,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2024-06-14 13:37:39,833 INFO L175 Difference]: Start difference. First operand has 369 places, 457 transitions, 6145 flow. Second operand 12 states and 186 transitions. [2024-06-14 13:37:39,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 492 transitions, 7545 flow [2024-06-14 13:37:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 492 transitions, 7473 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:42,540 INFO L231 Difference]: Finished difference. Result has 374 places, 463 transitions, 6301 flow [2024-06-14 13:37:42,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6301, PETRI_PLACES=374, PETRI_TRANSITIONS=463} [2024-06-14 13:37:42,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-14 13:37:42,540 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 463 transitions, 6301 flow [2024-06-14 13:37:42,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:42,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:42,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:42,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:37:42,541 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:42,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -119643487, now seen corresponding path program 19 times [2024-06-14 13:37:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:42,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450888253] [2024-06-14 13:37:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450888253] [2024-06-14 13:37:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450888253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345374751] [2024-06-14 13:37:45,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:45,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:45,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 463 transitions, 6301 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:45,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:45,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:45,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:47,571 INFO L124 PetriNetUnfolderBase]: 3823/6016 cut-off events. [2024-06-14 13:37:47,571 INFO L125 PetriNetUnfolderBase]: For 1113157/1113157 co-relation queries the response was YES. [2024-06-14 13:37:47,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47073 conditions, 6016 events. 3823/6016 cut-off events. For 1113157/1113157 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36215 event pairs, 829 based on Foata normal form. 8/6013 useless extension candidates. Maximal degree in co-relation 46902. Up to 5168 conditions per place. [2024-06-14 13:37:47,632 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 348 selfloop transitions, 145 changer transitions 0/498 dead transitions. [2024-06-14 13:37:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 498 transitions, 7929 flow [2024-06-14 13:37:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:37:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:37:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:37:47,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-14 13:37:47,634 INFO L175 Difference]: Start difference. First operand has 374 places, 463 transitions, 6301 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:37:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 498 transitions, 7929 flow [2024-06-14 13:37:50,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 498 transitions, 7842 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:50,589 INFO L231 Difference]: Finished difference. Result has 376 places, 469 transitions, 6593 flow [2024-06-14 13:37:50,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6593, PETRI_PLACES=376, PETRI_TRANSITIONS=469} [2024-06-14 13:37:50,604 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-14 13:37:50,605 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 469 transitions, 6593 flow [2024-06-14 13:37:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:50,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:50,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:37:50,605 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:50,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2064040045, now seen corresponding path program 20 times [2024-06-14 13:37:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:50,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882799353] [2024-06-14 13:37:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:50,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:53,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882799353] [2024-06-14 13:37:53,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882799353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:53,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:53,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:53,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477939852] [2024-06-14 13:37:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:53,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:37:53,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 469 transitions, 6593 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:53,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:53,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:37:53,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:55,691 INFO L124 PetriNetUnfolderBase]: 3799/5982 cut-off events. [2024-06-14 13:37:55,691 INFO L125 PetriNetUnfolderBase]: For 1074910/1074910 co-relation queries the response was YES. [2024-06-14 13:37:55,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46517 conditions, 5982 events. 3799/5982 cut-off events. For 1074910/1074910 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36013 event pairs, 827 based on Foata normal form. 8/5979 useless extension candidates. Maximal degree in co-relation 46345. Up to 5152 conditions per place. [2024-06-14 13:37:55,766 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 351 selfloop transitions, 144 changer transitions 0/500 dead transitions. [2024-06-14 13:37:55,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 500 transitions, 8154 flow [2024-06-14 13:37:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:37:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:37:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:37:55,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884297520661157 [2024-06-14 13:37:55,768 INFO L175 Difference]: Start difference. First operand has 376 places, 469 transitions, 6593 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:37:55,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 500 transitions, 8154 flow [2024-06-14 13:37:59,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 500 transitions, 7938 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:59,006 INFO L231 Difference]: Finished difference. Result has 381 places, 469 transitions, 6678 flow [2024-06-14 13:37:59,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6678, PETRI_PLACES=381, PETRI_TRANSITIONS=469} [2024-06-14 13:37:59,007 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 13:37:59,007 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 469 transitions, 6678 flow [2024-06-14 13:37:59,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:59,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:59,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:37:59,007 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:59,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -110923807, now seen corresponding path program 21 times [2024-06-14 13:37:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:59,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863308075] [2024-06-14 13:37:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863308075] [2024-06-14 13:38:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863308075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:01,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:01,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874941998] [2024-06-14 13:38:01,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:01,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:01,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 469 transitions, 6678 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:01,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:01,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:01,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:04,089 INFO L124 PetriNetUnfolderBase]: 3787/5974 cut-off events. [2024-06-14 13:38:04,089 INFO L125 PetriNetUnfolderBase]: For 1037961/1037961 co-relation queries the response was YES. [2024-06-14 13:38:04,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46130 conditions, 5974 events. 3787/5974 cut-off events. For 1037961/1037961 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36130 event pairs, 1069 based on Foata normal form. 4/5976 useless extension candidates. Maximal degree in co-relation 45957. Up to 5654 conditions per place. [2024-06-14 13:38:04,166 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 455 selfloop transitions, 30 changer transitions 0/490 dead transitions. [2024-06-14 13:38:04,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 490 transitions, 7696 flow [2024-06-14 13:38:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:38:04,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:38:04,168 INFO L175 Difference]: Start difference. First operand has 381 places, 469 transitions, 6678 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:38:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 490 transitions, 7696 flow [2024-06-14 13:38:06,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 490 transitions, 7439 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:06,632 INFO L231 Difference]: Finished difference. Result has 382 places, 469 transitions, 6487 flow [2024-06-14 13:38:06,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6487, PETRI_PLACES=382, PETRI_TRANSITIONS=469} [2024-06-14 13:38:06,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-14 13:38:06,633 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 469 transitions, 6487 flow [2024-06-14 13:38:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:38:06,633 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:06,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1673320537, now seen corresponding path program 22 times [2024-06-14 13:38:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130134088] [2024-06-14 13:38:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:09,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130134088] [2024-06-14 13:38:09,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130134088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:09,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771593465] [2024-06-14 13:38:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:09,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:09,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 469 transitions, 6487 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:09,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:11,644 INFO L124 PetriNetUnfolderBase]: 3775/5948 cut-off events. [2024-06-14 13:38:11,645 INFO L125 PetriNetUnfolderBase]: For 1018577/1018577 co-relation queries the response was YES. [2024-06-14 13:38:11,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 5948 events. 3775/5948 cut-off events. For 1018577/1018577 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35778 event pairs, 837 based on Foata normal form. 4/5941 useless extension candidates. Maximal degree in co-relation 45080. Up to 5136 conditions per place. [2024-06-14 13:38:11,708 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 341 selfloop transitions, 148 changer transitions 0/494 dead transitions. [2024-06-14 13:38:11,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 494 transitions, 8017 flow [2024-06-14 13:38:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:38:11,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39141414141414144 [2024-06-14 13:38:11,710 INFO L175 Difference]: Start difference. First operand has 382 places, 469 transitions, 6487 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:38:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 494 transitions, 8017 flow [2024-06-14 13:38:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 494 transitions, 7921 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:38:15,182 INFO L231 Difference]: Finished difference. Result has 382 places, 469 transitions, 6693 flow [2024-06-14 13:38:15,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6391, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6693, PETRI_PLACES=382, PETRI_TRANSITIONS=469} [2024-06-14 13:38:15,182 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-14 13:38:15,182 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 469 transitions, 6693 flow [2024-06-14 13:38:15,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:15,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:38:15,183 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:15,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1639171825, now seen corresponding path program 1 times [2024-06-14 13:38:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732121584] [2024-06-14 13:38:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:18,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732121584] [2024-06-14 13:38:18,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732121584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:18,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:18,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567658151] [2024-06-14 13:38:18,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:18,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:18,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:18,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 469 transitions, 6693 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:18,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:18,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:21,597 INFO L124 PetriNetUnfolderBase]: 3785/5969 cut-off events. [2024-06-14 13:38:21,597 INFO L125 PetriNetUnfolderBase]: For 1006560/1006560 co-relation queries the response was YES. [2024-06-14 13:38:21,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44859 conditions, 5969 events. 3785/5969 cut-off events. For 1006560/1006560 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35957 event pairs, 997 based on Foata normal form. 8/5973 useless extension candidates. Maximal degree in co-relation 44684. Up to 5474 conditions per place. [2024-06-14 13:38:21,663 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 447 selfloop transitions, 54 changer transitions 0/506 dead transitions. [2024-06-14 13:38:21,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 506 transitions, 7812 flow [2024-06-14 13:38:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:38:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:38:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:38:21,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371900826446281 [2024-06-14 13:38:21,664 INFO L175 Difference]: Start difference. First operand has 382 places, 469 transitions, 6693 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:38:21,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 506 transitions, 7812 flow [2024-06-14 13:38:24,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 506 transitions, 7106 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-14 13:38:24,553 INFO L231 Difference]: Finished difference. Result has 380 places, 470 transitions, 6118 flow [2024-06-14 13:38:24,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5987, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6118, PETRI_PLACES=380, PETRI_TRANSITIONS=470} [2024-06-14 13:38:24,553 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-14 13:38:24,553 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 470 transitions, 6118 flow [2024-06-14 13:38:24,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:24,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:24,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:24,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:38:24,554 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:24,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1850912353, now seen corresponding path program 2 times [2024-06-14 13:38:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:24,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105416805] [2024-06-14 13:38:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:24,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:28,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105416805] [2024-06-14 13:38:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105416805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:28,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:28,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129583490] [2024-06-14 13:38:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:28,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:28,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:28,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:28,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 470 transitions, 6118 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:28,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:28,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:30,369 INFO L124 PetriNetUnfolderBase]: 3767/5946 cut-off events. [2024-06-14 13:38:30,370 INFO L125 PetriNetUnfolderBase]: For 952119/952119 co-relation queries the response was YES. [2024-06-14 13:38:30,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43191 conditions, 5946 events. 3767/5946 cut-off events. For 952119/952119 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35897 event pairs, 1037 based on Foata normal form. 8/5952 useless extension candidates. Maximal degree in co-relation 43014. Up to 5524 conditions per place. [2024-06-14 13:38:30,434 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 458 selfloop transitions, 35 changer transitions 0/498 dead transitions. [2024-06-14 13:38:30,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 498 transitions, 7192 flow [2024-06-14 13:38:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:38:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:38:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:38:30,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3613636363636364 [2024-06-14 13:38:30,436 INFO L175 Difference]: Start difference. First operand has 380 places, 470 transitions, 6118 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:38:30,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 498 transitions, 7192 flow [2024-06-14 13:38:33,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 498 transitions, 7046 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 13:38:33,944 INFO L231 Difference]: Finished difference. Result has 380 places, 470 transitions, 6048 flow [2024-06-14 13:38:33,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6048, PETRI_PLACES=380, PETRI_TRANSITIONS=470} [2024-06-14 13:38:33,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-14 13:38:33,945 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 470 transitions, 6048 flow [2024-06-14 13:38:33,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:33,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:33,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:38:33,945 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:33,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1121872674, now seen corresponding path program 1 times [2024-06-14 13:38:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916302279] [2024-06-14 13:38:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916302279] [2024-06-14 13:38:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916302279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837821102] [2024-06-14 13:38:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:37,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:37,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 470 transitions, 6048 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:37,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:37,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:37,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:39,927 INFO L124 PetriNetUnfolderBase]: 3855/6108 cut-off events. [2024-06-14 13:38:39,928 INFO L125 PetriNetUnfolderBase]: For 965557/965557 co-relation queries the response was YES. [2024-06-14 13:38:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43705 conditions, 6108 events. 3855/6108 cut-off events. For 965557/965557 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37186 event pairs, 767 based on Foata normal form. 8/6114 useless extension candidates. Maximal degree in co-relation 43528. Up to 5449 conditions per place. [2024-06-14 13:38:39,995 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 462 selfloop transitions, 54 changer transitions 0/521 dead transitions. [2024-06-14 13:38:39,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 521 transitions, 7550 flow [2024-06-14 13:38:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:38:40,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 13:38:40,012 INFO L175 Difference]: Start difference. First operand has 380 places, 470 transitions, 6048 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:38:40,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 521 transitions, 7550 flow [2024-06-14 13:38:43,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 521 transitions, 7457 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:43,789 INFO L231 Difference]: Finished difference. Result has 382 places, 474 transitions, 6154 flow [2024-06-14 13:38:43,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6154, PETRI_PLACES=382, PETRI_TRANSITIONS=474} [2024-06-14 13:38:43,790 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-14 13:38:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 474 transitions, 6154 flow [2024-06-14 13:38:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:38:43,791 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:43,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 547429018, now seen corresponding path program 2 times [2024-06-14 13:38:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982905537] [2024-06-14 13:38:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:48,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:48,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982905537] [2024-06-14 13:38:48,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982905537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:48,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:48,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132468824] [2024-06-14 13:38:48,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:48,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:48,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:48,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:48,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 474 transitions, 6154 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:48,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:48,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:48,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:50,592 INFO L124 PetriNetUnfolderBase]: 3929/6226 cut-off events. [2024-06-14 13:38:50,592 INFO L125 PetriNetUnfolderBase]: For 982910/982910 co-relation queries the response was YES. [2024-06-14 13:38:50,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44520 conditions, 6226 events. 3929/6226 cut-off events. For 982910/982910 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38113 event pairs, 870 based on Foata normal form. 8/6232 useless extension candidates. Maximal degree in co-relation 44342. Up to 5759 conditions per place. [2024-06-14 13:38:50,671 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 466 selfloop transitions, 50 changer transitions 0/521 dead transitions. [2024-06-14 13:38:50,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 521 transitions, 7410 flow [2024-06-14 13:38:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:38:50,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 13:38:50,674 INFO L175 Difference]: Start difference. First operand has 382 places, 474 transitions, 6154 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:38:50,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 521 transitions, 7410 flow [2024-06-14 13:38:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 521 transitions, 7025 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 13:38:54,819 INFO L231 Difference]: Finished difference. Result has 383 places, 479 transitions, 5963 flow [2024-06-14 13:38:54,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5963, PETRI_PLACES=383, PETRI_TRANSITIONS=479} [2024-06-14 13:38:54,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 13:38:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 479 transitions, 5963 flow [2024-06-14 13:38:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:54,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:54,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:38:54,821 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1306624928, now seen corresponding path program 1 times [2024-06-14 13:38:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601505663] [2024-06-14 13:38:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601505663] [2024-06-14 13:38:57,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601505663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:57,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:57,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:57,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600173285] [2024-06-14 13:38:57,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:57,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:57,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:38:57,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 479 transitions, 5963 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:38:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:59,955 INFO L124 PetriNetUnfolderBase]: 3939/6236 cut-off events. [2024-06-14 13:38:59,955 INFO L125 PetriNetUnfolderBase]: For 946703/946703 co-relation queries the response was YES. [2024-06-14 13:39:00,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44161 conditions, 6236 events. 3939/6236 cut-off events. For 946703/946703 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38199 event pairs, 937 based on Foata normal form. 2/6236 useless extension candidates. Maximal degree in co-relation 43985. Up to 5840 conditions per place. [2024-06-14 13:39:00,038 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 463 selfloop transitions, 54 changer transitions 0/522 dead transitions. [2024-06-14 13:39:00,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 522 transitions, 7409 flow [2024-06-14 13:39:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:39:00,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:39:00,040 INFO L175 Difference]: Start difference. First operand has 383 places, 479 transitions, 5963 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:39:00,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 522 transitions, 7409 flow [2024-06-14 13:39:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 522 transitions, 7299 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:04,164 INFO L231 Difference]: Finished difference. Result has 387 places, 482 transitions, 6011 flow [2024-06-14 13:39:04,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6011, PETRI_PLACES=387, PETRI_TRANSITIONS=482} [2024-06-14 13:39:04,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 342 predicate places. [2024-06-14 13:39:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 482 transitions, 6011 flow [2024-06-14 13:39:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:39:04,165 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:04,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 370389754, now seen corresponding path program 1 times [2024-06-14 13:39:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910677774] [2024-06-14 13:39:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:07,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:07,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910677774] [2024-06-14 13:39:07,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910677774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:07,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:07,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:07,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078756042] [2024-06-14 13:39:07,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:07,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:07,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:07,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:39:07,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 482 transitions, 6011 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:07,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:07,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:39:07,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:10,380 INFO L124 PetriNetUnfolderBase]: 3981/6294 cut-off events. [2024-06-14 13:39:10,380 INFO L125 PetriNetUnfolderBase]: For 994781/994781 co-relation queries the response was YES. [2024-06-14 13:39:10,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45035 conditions, 6294 events. 3981/6294 cut-off events. For 994781/994781 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38486 event pairs, 886 based on Foata normal form. 2/6294 useless extension candidates. Maximal degree in co-relation 44858. Up to 5657 conditions per place. [2024-06-14 13:39:10,465 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 429 selfloop transitions, 101 changer transitions 0/535 dead transitions. [2024-06-14 13:39:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 535 transitions, 7835 flow [2024-06-14 13:39:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:39:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:39:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 13:39:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 13:39:10,467 INFO L175 Difference]: Start difference. First operand has 387 places, 482 transitions, 6011 flow. Second operand 10 states and 188 transitions. [2024-06-14 13:39:10,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 535 transitions, 7835 flow [2024-06-14 13:39:14,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 535 transitions, 7715 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:14,786 INFO L231 Difference]: Finished difference. Result has 391 places, 488 transitions, 6269 flow [2024-06-14 13:39:14,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5891, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6269, PETRI_PLACES=391, PETRI_TRANSITIONS=488} [2024-06-14 13:39:14,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 13:39:14,786 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 488 transitions, 6269 flow [2024-06-14 13:39:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:14,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:14,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:39:14,787 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:14,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1270605252, now seen corresponding path program 2 times [2024-06-14 13:39:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920192329] [2024-06-14 13:39:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920192329] [2024-06-14 13:39:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920192329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:18,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:18,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159537758] [2024-06-14 13:39:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:18,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:39:18,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 488 transitions, 6269 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:18,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:18,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:39:18,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:20,858 INFO L124 PetriNetUnfolderBase]: 3975/6286 cut-off events. [2024-06-14 13:39:20,858 INFO L125 PetriNetUnfolderBase]: For 997069/997069 co-relation queries the response was YES. [2024-06-14 13:39:20,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45713 conditions, 6286 events. 3975/6286 cut-off events. For 997069/997069 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38500 event pairs, 939 based on Foata normal form. 2/6286 useless extension candidates. Maximal degree in co-relation 45534. Up to 5893 conditions per place. [2024-06-14 13:39:20,939 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 469 selfloop transitions, 54 changer transitions 0/528 dead transitions. [2024-06-14 13:39:20,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 528 transitions, 7429 flow [2024-06-14 13:39:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:39:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:39:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:39:20,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:39:20,941 INFO L175 Difference]: Start difference. First operand has 391 places, 488 transitions, 6269 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:39:20,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 528 transitions, 7429 flow [2024-06-14 13:39:25,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 528 transitions, 7227 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:25,200 INFO L231 Difference]: Finished difference. Result has 396 places, 488 transitions, 6181 flow [2024-06-14 13:39:25,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6181, PETRI_PLACES=396, PETRI_TRANSITIONS=488} [2024-06-14 13:39:25,212 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-14 13:39:25,213 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 488 transitions, 6181 flow [2024-06-14 13:39:25,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:25,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:25,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:25,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:39:25,213 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:25,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -505355498, now seen corresponding path program 3 times [2024-06-14 13:39:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:25,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666720845] [2024-06-14 13:39:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666720845] [2024-06-14 13:39:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666720845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:29,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725835341] [2024-06-14 13:39:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:29,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:39:29,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 488 transitions, 6181 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:29,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:29,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:39:29,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:32,004 INFO L124 PetriNetUnfolderBase]: 4003/6330 cut-off events. [2024-06-14 13:39:32,004 INFO L125 PetriNetUnfolderBase]: For 1061256/1061256 co-relation queries the response was YES. [2024-06-14 13:39:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46010 conditions, 6330 events. 4003/6330 cut-off events. For 1061256/1061256 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 38743 event pairs, 905 based on Foata normal form. 8/6336 useless extension candidates. Maximal degree in co-relation 45829. Up to 5867 conditions per place. [2024-06-14 13:39:32,098 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 473 selfloop transitions, 47 changer transitions 0/525 dead transitions. [2024-06-14 13:39:32,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 525 transitions, 7394 flow [2024-06-14 13:39:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:39:32,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:39:32,099 INFO L175 Difference]: Start difference. First operand has 396 places, 488 transitions, 6181 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:39:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 525 transitions, 7394 flow [2024-06-14 13:39:36,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 525 transitions, 7272 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:36,458 INFO L231 Difference]: Finished difference. Result has 399 places, 490 transitions, 6217 flow [2024-06-14 13:39:36,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6059, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6217, PETRI_PLACES=399, PETRI_TRANSITIONS=490} [2024-06-14 13:39:36,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 13:39:36,459 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 490 transitions, 6217 flow [2024-06-14 13:39:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:36,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:36,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:39:36,459 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:36,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1906621470, now seen corresponding path program 3 times [2024-06-14 13:39:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534815181] [2024-06-14 13:39:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:39,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:39,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534815181] [2024-06-14 13:39:39,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534815181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:39,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183485810] [2024-06-14 13:39:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:39,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:39:39,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 490 transitions, 6217 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:39,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:39,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:39:39,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:42,214 INFO L124 PetriNetUnfolderBase]: 4093/6468 cut-off events. [2024-06-14 13:39:42,215 INFO L125 PetriNetUnfolderBase]: For 1113547/1113551 co-relation queries the response was YES. [2024-06-14 13:39:42,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48354 conditions, 6468 events. 4093/6468 cut-off events. For 1113547/1113551 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39585 event pairs, 796 based on Foata normal form. 6/6469 useless extension candidates. Maximal degree in co-relation 48172. Up to 5442 conditions per place. [2024-06-14 13:39:42,310 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 371 selfloop transitions, 169 changer transitions 0/545 dead transitions. [2024-06-14 13:39:42,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 545 transitions, 8512 flow [2024-06-14 13:39:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:39:42,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 13:39:42,312 INFO L175 Difference]: Start difference. First operand has 399 places, 490 transitions, 6217 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:39:42,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 545 transitions, 8512 flow [2024-06-14 13:39:47,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 545 transitions, 8414 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:47,092 INFO L231 Difference]: Finished difference. Result has 402 places, 508 transitions, 6790 flow [2024-06-14 13:39:47,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6790, PETRI_PLACES=402, PETRI_TRANSITIONS=508} [2024-06-14 13:39:47,092 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 13:39:47,092 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 508 transitions, 6790 flow [2024-06-14 13:39:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:47,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:47,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:39:47,093 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:47,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1596989888, now seen corresponding path program 4 times [2024-06-14 13:39:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:47,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988430383] [2024-06-14 13:39:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:50,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:50,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988430383] [2024-06-14 13:39:50,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988430383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:50,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:50,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:50,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170971719] [2024-06-14 13:39:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:50,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:39:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 508 transitions, 6790 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:39:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:53,322 INFO L124 PetriNetUnfolderBase]: 4119/6512 cut-off events. [2024-06-14 13:39:53,323 INFO L125 PetriNetUnfolderBase]: For 1148829/1148833 co-relation queries the response was YES. [2024-06-14 13:39:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49359 conditions, 6512 events. 4119/6512 cut-off events. For 1148829/1148833 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39960 event pairs, 805 based on Foata normal form. 6/6513 useless extension candidates. Maximal degree in co-relation 49177. Up to 5467 conditions per place. [2024-06-14 13:39:53,396 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 369 selfloop transitions, 173 changer transitions 0/547 dead transitions. [2024-06-14 13:39:53,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 547 transitions, 8886 flow [2024-06-14 13:39:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:39:53,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:39:53,398 INFO L175 Difference]: Start difference. First operand has 402 places, 508 transitions, 6790 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:39:53,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 547 transitions, 8886 flow [2024-06-14 13:39:57,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 547 transitions, 8587 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 13:39:57,261 INFO L231 Difference]: Finished difference. Result has 407 places, 514 transitions, 6973 flow [2024-06-14 13:39:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6531, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6973, PETRI_PLACES=407, PETRI_TRANSITIONS=514} [2024-06-14 13:39:57,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-14 13:39:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 514 transitions, 6973 flow [2024-06-14 13:39:57,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:39:57,262 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 298748410, now seen corresponding path program 5 times [2024-06-14 13:39:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155636529] [2024-06-14 13:39:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155636529] [2024-06-14 13:40:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155636529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:00,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:00,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079038936] [2024-06-14 13:40:00,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:00,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:00,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:00,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 514 transitions, 6973 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:00,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:00,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:03,527 INFO L124 PetriNetUnfolderBase]: 4161/6569 cut-off events. [2024-06-14 13:40:03,527 INFO L125 PetriNetUnfolderBase]: For 1203325/1203325 co-relation queries the response was YES. [2024-06-14 13:40:03,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50319 conditions, 6569 events. 4161/6569 cut-off events. For 1203325/1203325 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40302 event pairs, 828 based on Foata normal form. 2/6566 useless extension candidates. Maximal degree in co-relation 50136. Up to 5507 conditions per place. [2024-06-14 13:40:03,601 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 381 selfloop transitions, 177 changer transitions 0/563 dead transitions. [2024-06-14 13:40:03,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 563 transitions, 8912 flow [2024-06-14 13:40:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:40:03,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 13:40:03,603 INFO L175 Difference]: Start difference. First operand has 407 places, 514 transitions, 6973 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:40:03,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 563 transitions, 8912 flow [2024-06-14 13:40:07,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 563 transitions, 8611 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:07,134 INFO L231 Difference]: Finished difference. Result has 412 places, 523 transitions, 7211 flow [2024-06-14 13:40:07,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6699, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7211, PETRI_PLACES=412, PETRI_TRANSITIONS=523} [2024-06-14 13:40:07,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 13:40:07,135 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 523 transitions, 7211 flow [2024-06-14 13:40:07,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:07,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:07,135 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, 1, 1, 1] [2024-06-14 13:40:07,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:40:07,135 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:07,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1911863694, now seen corresponding path program 2 times [2024-06-14 13:40:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:07,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40865673] [2024-06-14 13:40:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:10,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40865673] [2024-06-14 13:40:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40865673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:10,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:10,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:10,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909074560] [2024-06-14 13:40:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:10,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:10,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:10,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 523 transitions, 7211 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:10,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:10,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:10,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:13,543 INFO L124 PetriNetUnfolderBase]: 4187/6609 cut-off events. [2024-06-14 13:40:13,544 INFO L125 PetriNetUnfolderBase]: For 1243556/1243556 co-relation queries the response was YES. [2024-06-14 13:40:13,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51191 conditions, 6609 events. 4187/6609 cut-off events. For 1243556/1243556 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40637 event pairs, 823 based on Foata normal form. 2/6606 useless extension candidates. Maximal degree in co-relation 51007. Up to 4352 conditions per place. [2024-06-14 13:40:13,622 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 292 selfloop transitions, 276 changer transitions 0/573 dead transitions. [2024-06-14 13:40:13,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 573 transitions, 9541 flow [2024-06-14 13:40:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:40:13,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 13:40:13,624 INFO L175 Difference]: Start difference. First operand has 412 places, 523 transitions, 7211 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:40:13,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 573 transitions, 9541 flow [2024-06-14 13:40:17,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 573 transitions, 9123 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:17,667 INFO L231 Difference]: Finished difference. Result has 417 places, 532 transitions, 7820 flow [2024-06-14 13:40:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7820, PETRI_PLACES=417, PETRI_TRANSITIONS=532} [2024-06-14 13:40:17,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-14 13:40:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 532 transitions, 7820 flow [2024-06-14 13:40:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:17,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:17,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:40:17,668 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:17,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -917610148, now seen corresponding path program 6 times [2024-06-14 13:40:17,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:17,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159041660] [2024-06-14 13:40:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:17,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:21,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159041660] [2024-06-14 13:40:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159041660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:21,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:21,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:21,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023857047] [2024-06-14 13:40:21,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:21,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 532 transitions, 7820 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:21,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:21,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:24,127 INFO L124 PetriNetUnfolderBase]: 4197/6615 cut-off events. [2024-06-14 13:40:24,128 INFO L125 PetriNetUnfolderBase]: For 1267472/1267472 co-relation queries the response was YES. [2024-06-14 13:40:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53011 conditions, 6615 events. 4197/6615 cut-off events. For 1267472/1267472 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40530 event pairs, 831 based on Foata normal form. 2/6612 useless extension candidates. Maximal degree in co-relation 52824. Up to 5553 conditions per place. [2024-06-14 13:40:24,217 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 384 selfloop transitions, 180 changer transitions 0/569 dead transitions. [2024-06-14 13:40:24,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 569 transitions, 9359 flow [2024-06-14 13:40:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:40:24,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-14 13:40:24,219 INFO L175 Difference]: Start difference. First operand has 417 places, 532 transitions, 7820 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:40:24,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 569 transitions, 9359 flow [2024-06-14 13:40:29,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 569 transitions, 9126 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:29,325 INFO L231 Difference]: Finished difference. Result has 422 places, 535 transitions, 7998 flow [2024-06-14 13:40:29,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7587, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7998, PETRI_PLACES=422, PETRI_TRANSITIONS=535} [2024-06-14 13:40:29,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 377 predicate places. [2024-06-14 13:40:29,325 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 535 transitions, 7998 flow [2024-06-14 13:40:29,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:29,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:29,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:29,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:40:29,326 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:29,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -592661638, now seen corresponding path program 7 times [2024-06-14 13:40:29,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:29,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720051850] [2024-06-14 13:40:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:29,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:32,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720051850] [2024-06-14 13:40:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720051850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:32,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:32,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:32,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429645214] [2024-06-14 13:40:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:32,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:32,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:32,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 535 transitions, 7998 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:32,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:32,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:32,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:35,687 INFO L124 PetriNetUnfolderBase]: 4207/6637 cut-off events. [2024-06-14 13:40:35,688 INFO L125 PetriNetUnfolderBase]: For 1281927/1281927 co-relation queries the response was YES. [2024-06-14 13:40:35,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52917 conditions, 6637 events. 4207/6637 cut-off events. For 1281927/1281927 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40789 event pairs, 831 based on Foata normal form. 2/6634 useless extension candidates. Maximal degree in co-relation 52728. Up to 5563 conditions per place. [2024-06-14 13:40:35,782 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 182 changer transitions 0/570 dead transitions. [2024-06-14 13:40:35,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 570 transitions, 9811 flow [2024-06-14 13:40:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:40:35,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:40:35,785 INFO L175 Difference]: Start difference. First operand has 422 places, 535 transitions, 7998 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:40:35,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 570 transitions, 9811 flow [2024-06-14 13:40:41,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 570 transitions, 9579 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:41,327 INFO L231 Difference]: Finished difference. Result has 425 places, 538 transitions, 8187 flow [2024-06-14 13:40:41,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8187, PETRI_PLACES=425, PETRI_TRANSITIONS=538} [2024-06-14 13:40:41,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-14 13:40:41,328 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 538 transitions, 8187 flow [2024-06-14 13:40:41,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:41,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:41,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:40:41,328 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:41,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1390734244, now seen corresponding path program 3 times [2024-06-14 13:40:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:41,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80430801] [2024-06-14 13:40:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80430801] [2024-06-14 13:40:45,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80430801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:45,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:45,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033598368] [2024-06-14 13:40:45,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:45,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 538 transitions, 8187 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:45,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:45,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:45,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:48,292 INFO L124 PetriNetUnfolderBase]: 4233/6673 cut-off events. [2024-06-14 13:40:48,292 INFO L125 PetriNetUnfolderBase]: For 1325623/1325623 co-relation queries the response was YES. [2024-06-14 13:40:48,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53801 conditions, 6673 events. 4233/6673 cut-off events. For 1325623/1325623 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 40976 event pairs, 824 based on Foata normal form. 2/6670 useless extension candidates. Maximal degree in co-relation 53611. Up to 4379 conditions per place. [2024-06-14 13:40:48,367 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 297 selfloop transitions, 280 changer transitions 0/582 dead transitions. [2024-06-14 13:40:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 582 transitions, 10471 flow [2024-06-14 13:40:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:40:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:40:48,369 INFO L175 Difference]: Start difference. First operand has 425 places, 538 transitions, 8187 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:40:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 582 transitions, 10471 flow [2024-06-14 13:40:53,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 582 transitions, 10233 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:53,461 INFO L231 Difference]: Finished difference. Result has 429 places, 544 transitions, 8663 flow [2024-06-14 13:40:53,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8663, PETRI_PLACES=429, PETRI_TRANSITIONS=544} [2024-06-14 13:40:53,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-14 13:40:53,462 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 544 transitions, 8663 flow [2024-06-14 13:40:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:53,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:53,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:53,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:40:53,462 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:40:53,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash -592869028, now seen corresponding path program 8 times [2024-06-14 13:40:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:53,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555960639] [2024-06-14 13:40:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:57,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:57,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555960639] [2024-06-14 13:40:57,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555960639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:57,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951326651] [2024-06-14 13:40:57,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:57,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:57,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:57,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:40:57,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 544 transitions, 8663 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:57,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:57,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:40:57,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:59,900 INFO L124 PetriNetUnfolderBase]: 4227/6665 cut-off events. [2024-06-14 13:40:59,901 INFO L125 PetriNetUnfolderBase]: For 1330025/1330025 co-relation queries the response was YES. [2024-06-14 13:40:59,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54122 conditions, 6665 events. 4227/6665 cut-off events. For 1330025/1330025 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 40918 event pairs, 835 based on Foata normal form. 2/6662 useless extension candidates. Maximal degree in co-relation 53931. Up to 5594 conditions per place. [2024-06-14 13:40:59,980 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 387 selfloop transitions, 182 changer transitions 0/574 dead transitions. [2024-06-14 13:40:59,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 574 transitions, 10161 flow [2024-06-14 13:40:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:40:59,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:40:59,982 INFO L175 Difference]: Start difference. First operand has 429 places, 544 transitions, 8663 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:40:59,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 574 transitions, 10161 flow Killed by 15