./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_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/safe020_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/safe020_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe020_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 13:25:28,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:25:28,908 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:25:28,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:25:28,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:25:28,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:25:28,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:25:28,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:25:28,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:25:28,941 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:25:28,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:25:28,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:25:28,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:25:28,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:25:28,943 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:25:28,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:25:28,944 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:25:28,944 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:25:28,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:25:28,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:25:28,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:25:28,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:25:28,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:25:28,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:25:28,946 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:25:28,946 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:25:28,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:25:28,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:25:28,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:25:28,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:25:28,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:25:28,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:25:28,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:25:28,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:25:28,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:25:28,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:25:28,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:25:28,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:25:28,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:25:28,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:25:28,950 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:25:28,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:25:28,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:25:28,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:25:29,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:25:29,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:25:29,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:25:29,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:25:29,162 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:25:29,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-14 13:25:30,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:25:30,299 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:25:30,300 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-14 13:25:30,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8973a7d38/686ed6c169354767a68cd80e5e7acb13/FLAGbea1cf5ca [2024-06-14 13:25:30,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8973a7d38/686ed6c169354767a68cd80e5e7acb13 [2024-06-14 13:25:30,325 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:25:30,325 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:25:30,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe020_rmo.yml/witness.yml [2024-06-14 13:25:30,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:25:30,510 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:25:30,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:25:30,511 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:25:30,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:25:30,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:25:30" (1/2) ... [2024-06-14 13:25:30,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7427f132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:25:30, skipping insertion in model container [2024-06-14 13:25:30,516 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:25:30" (1/2) ... [2024-06-14 13:25:30,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31ade1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:25:30, skipping insertion in model container [2024-06-14 13:25:30,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:25:30" (2/2) ... [2024-06-14 13:25:30,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7427f132 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:30, skipping insertion in model container [2024-06-14 13:25:30,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:25:30" (2/2) ... [2024-06-14 13:25:30,519 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:25:30,670 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:25:30,671 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:25:30,671 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:25:30,672 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:25:30,672 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:25:30,672 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-14 13:25:30,706 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:25:30,982 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:25:30,993 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:25:31,156 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:25:31,185 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:25:31,188 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31 WrapperNode [2024-06-14 13:25:31,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:25:31,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:25:31,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:25:31,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:25:31,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,260 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 207 [2024-06-14 13:25:31,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:25:31,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:25:31,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:25:31,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:25:31,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,286 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,314 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-14 13:25:31,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:25:31,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:25:31,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:25:31,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:25:31,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (1/1) ... [2024-06-14 13:25:31,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:25:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:25:31,383 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 13:25:31,395 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 13:25:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:25:31,415 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:25:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:25:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:25:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:25:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:25:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:25:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:25:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:25:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:25:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:25:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:25:31,419 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 13:25:31,530 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:25:31,531 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:25:31,935 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:25:31,936 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:25:32,270 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:25:32,270 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:25:32,271 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:25:32 BoogieIcfgContainer [2024-06-14 13:25:32,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:25:32,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:25:32,273 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:25:32,276 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:25:32,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:25:30" (1/4) ... [2024-06-14 13:25:32,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d2b2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:25:32, skipping insertion in model container [2024-06-14 13:25:32,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:25:30" (2/4) ... [2024-06-14 13:25:32,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d2b2ed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:25:32, skipping insertion in model container [2024-06-14 13:25:32,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:25:31" (3/4) ... [2024-06-14 13:25:32,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d2b2ed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:25:32, skipping insertion in model container [2024-06-14 13:25:32,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:25:32" (4/4) ... [2024-06-14 13:25:32,278 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2024-06-14 13:25:32,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:25:32,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:25:32,293 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:25:32,349 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:25:32,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:25:32,410 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:25:32,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:25:32,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:25:32,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:25:32,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:25:32,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:25:32,434 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;@4ab5366e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:25:32,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:25:32,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:25:32,441 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:25:32,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:25:32,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:32,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:25:32,442 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 13:25:32,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1946080188, now seen corresponding path program 1 times [2024-06-14 13:25:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443640057] [2024-06-14 13:25:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:34,173 INFO 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 13:25:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443640057] [2024-06-14 13:25:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443640057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:34,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:25:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864826624] [2024-06-14 13:25:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:25:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:25:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:25:34,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:34,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:34,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:34,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:34,705 INFO L124 PetriNetUnfolderBase]: 1160/1783 cut-off events. [2024-06-14 13:25:34,705 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 13:25:34,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 1783 events. 1160/1783 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8313 event pairs, 777 based on Foata normal form. 1/1753 useless extension candidates. Maximal degree in co-relation 3595. Up to 1748 conditions per place. [2024-06-14 13:25:34,719 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:25:34,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 189 flow [2024-06-14 13:25:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:25:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:25:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-14 13:25:34,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-06-14 13:25:34,730 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 68 transitions. [2024-06-14 13:25:34,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 189 flow [2024-06-14 13:25:34,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:34,735 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:25:34,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:25:34,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:25:34,740 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:25:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:34,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:34,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:25:34,741 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 13:25:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1872338427, now seen corresponding path program 1 times [2024-06-14 13:25:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26627797] [2024-06-14 13:25:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:35,995 INFO 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 13:25:35,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26627797] [2024-06-14 13:25:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26627797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:25:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192666652] [2024-06-14 13:25:35,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:25:35,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:25:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:25:36,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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 13:25:36,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:36,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:36,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:36,507 INFO L124 PetriNetUnfolderBase]: 1148/1765 cut-off events. [2024-06-14 13:25:36,508 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-14 13:25:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4061 conditions, 1765 events. 1148/1765 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8253 event pairs, 521 based on Foata normal form. 6/1770 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-14 13:25:36,517 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-14 13:25:36,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 268 flow [2024-06-14 13:25:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:25:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:25:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-14 13:25:36,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174418604651163 [2024-06-14 13:25:36,521 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 89 transitions. [2024-06-14 13:25:36,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 268 flow [2024-06-14 13:25:36,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:25:36,524 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:25:36,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 13:25:36,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:25:36,527 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:25:36,528 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 13:25:36,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:36,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:36,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:25:36,532 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 13:25:36,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1335521671, now seen corresponding path program 1 times [2024-06-14 13:25:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582675076] [2024-06-14 13:25:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582675076] [2024-06-14 13:25:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582675076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:38,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:25:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382453819] [2024-06-14 13:25:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:38,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:25:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:25:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:25:38,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:38,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 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 13:25:38,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:38,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:38,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:39,537 INFO L124 PetriNetUnfolderBase]: 1139/1750 cut-off events. [2024-06-14 13:25:39,538 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-14 13:25:39,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 1750 events. 1139/1750 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8137 event pairs, 375 based on Foata normal form. 6/1755 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-14 13:25:39,548 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:25:39,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 386 flow [2024-06-14 13:25:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 13:25:39,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 13:25:39,553 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 123 transitions. [2024-06-14 13:25:39,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 386 flow [2024-06-14 13:25:39,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 366 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:25:39,556 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 13:25:39,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 13:25:39,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 13:25:39,557 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 13:25:39,557 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 13:25:39,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:39,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:25:39,558 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 13:25:39,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash -627453238, now seen corresponding path program 1 times [2024-06-14 13:25:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550403580] [2024-06-14 13:25:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:40,980 INFO 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 13:25:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550403580] [2024-06-14 13:25:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550403580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:40,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:40,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:25:40,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671193990] [2024-06-14 13:25:40,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:40,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:25:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:25:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:25:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:40,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:40,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:40,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:41,803 INFO L124 PetriNetUnfolderBase]: 1129/1736 cut-off events. [2024-06-14 13:25:41,803 INFO L125 PetriNetUnfolderBase]: For 1864/1864 co-relation queries the response was YES. [2024-06-14 13:25:41,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4909 conditions, 1736 events. 1129/1736 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8044 event pairs, 446 based on Foata normal form. 4/1739 useless extension candidates. Maximal degree in co-relation 4890. Up to 1679 conditions per place. [2024-06-14 13:25:41,811 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-14 13:25:41,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 347 flow [2024-06-14 13:25:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:25:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:25:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:25:41,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:25:41,812 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:25:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 347 flow [2024-06-14 13:25:41,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:41,815 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-14 13:25:41,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 13:25:41,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 13:25:41,816 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-14 13:25:41,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:41,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:41,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:25:41,817 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 13:25:41,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1436200259, now seen corresponding path program 1 times [2024-06-14 13:25:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963825292] [2024-06-14 13:25:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:43,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963825292] [2024-06-14 13:25:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963825292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:43,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:43,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:25:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380126607] [2024-06-14 13:25:43,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:25:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:25:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:25:43,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 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 13:25:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:44,475 INFO L124 PetriNetUnfolderBase]: 1155/1788 cut-off events. [2024-06-14 13:25:44,475 INFO L125 PetriNetUnfolderBase]: For 2713/2716 co-relation queries the response was YES. [2024-06-14 13:25:44,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 1788 events. 1155/1788 cut-off events. For 2713/2716 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8358 event pairs, 420 based on Foata normal form. 6/1791 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-14 13:25:44,485 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-14 13:25:44,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 470 flow [2024-06-14 13:25:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:25:44,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:25:44,487 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:25:44,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 470 flow [2024-06-14 13:25:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 450 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:44,489 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 262 flow [2024-06-14 13:25:44,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-14 13:25:44,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 13:25:44,492 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 262 flow [2024-06-14 13:25:44,492 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 13:25:44,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:44,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:25:44,493 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 13:25:44,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1428813269, now seen corresponding path program 2 times [2024-06-14 13:25:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839167342] [2024-06-14 13:25:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:44,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:46,042 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 13:25:46,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839167342] [2024-06-14 13:25:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839167342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:46,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:46,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:25:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099609913] [2024-06-14 13:25:46,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:46,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:25:46,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:25:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:25:46,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:46,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 262 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 13:25:46,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:46,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:47,067 INFO L124 PetriNetUnfolderBase]: 1145/1765 cut-off events. [2024-06-14 13:25:47,067 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-14 13:25:47,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 1765 events. 1145/1765 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8232 event pairs, 419 based on Foata normal form. 4/1766 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-14 13:25:47,078 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-14 13:25:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 450 flow [2024-06-14 13:25:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:25:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:25:47,079 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 262 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:25:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 450 flow [2024-06-14 13:25:47,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 420 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:25:47,088 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 272 flow [2024-06-14 13:25:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-14 13:25:47,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 13:25:47,091 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 272 flow [2024-06-14 13:25:47,091 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 13:25:47,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:47,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:47,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:25:47,091 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 13:25:47,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1437741641, now seen corresponding path program 1 times [2024-06-14 13:25:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:47,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516350934] [2024-06-14 13:25:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:47,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:49,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516350934] [2024-06-14 13:25:49,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516350934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:49,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:49,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298088580] [2024-06-14 13:25:49,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:49,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:49,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:49,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 272 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 13:25:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:50,280 INFO L124 PetriNetUnfolderBase]: 1137/1760 cut-off events. [2024-06-14 13:25:50,280 INFO L125 PetriNetUnfolderBase]: For 4532/4532 co-relation queries the response was YES. [2024-06-14 13:25:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5892 conditions, 1760 events. 1137/1760 cut-off events. For 4532/4532 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8175 event pairs, 406 based on Foata normal form. 4/1763 useless extension candidates. Maximal degree in co-relation 5868. Up to 1669 conditions per place. [2024-06-14 13:25:50,288 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 61 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-14 13:25:50,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 482 flow [2024-06-14 13:25:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:25:50,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:25:50,290 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 272 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:25:50,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 482 flow [2024-06-14 13:25:50,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 438 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:25:50,294 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 277 flow [2024-06-14 13:25:50,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 13:25:50,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 13:25:50,295 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 277 flow [2024-06-14 13:25:50,295 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 13:25:50,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:50,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:50,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:25:50,296 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 13:25:50,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash 77337288, now seen corresponding path program 1 times [2024-06-14 13:25:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:50,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421705131] [2024-06-14 13:25:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:52,550 INFO 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 13:25:52,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:52,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421705131] [2024-06-14 13:25:52,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421705131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:52,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:52,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:52,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987945840] [2024-06-14 13:25:52,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:52,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:52,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:52,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 277 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 13:25:52,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:52,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:52,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:53,581 INFO L124 PetriNetUnfolderBase]: 1163/1804 cut-off events. [2024-06-14 13:25:53,582 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-14 13:25:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1804 events. 1163/1804 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8506 event pairs, 436 based on Foata normal form. 4/1807 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-14 13:25:53,597 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 13:25:53,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 553 flow [2024-06-14 13:25:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:25:53,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:25:53,599 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 277 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:25:53,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 553 flow [2024-06-14 13:25:53,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 91 transitions, 522 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:53,604 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-14 13:25:53,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 13:25:53,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 13:25:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-14 13:25:53,606 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 13:25:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:53,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:53,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:25:53,607 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 13:25:53,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 82098888, now seen corresponding path program 2 times [2024-06-14 13:25:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432427659] [2024-06-14 13:25:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:55,754 INFO 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 13:25:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432427659] [2024-06-14 13:25:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432427659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91430214] [2024-06-14 13:25:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:55,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:55,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 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 13:25:55,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:55,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:55,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:56,922 INFO L124 PetriNetUnfolderBase]: 1189/1862 cut-off events. [2024-06-14 13:25:56,922 INFO L125 PetriNetUnfolderBase]: For 7667/7673 co-relation queries the response was YES. [2024-06-14 13:25:56,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1862 events. 1189/1862 cut-off events. For 7667/7673 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8925 event pairs, 380 based on Foata normal form. 8/1867 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-14 13:25:56,931 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-14 13:25:56,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 670 flow [2024-06-14 13:25:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:25:56,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 13:25:56,954 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:25:56,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 670 flow [2024-06-14 13:25:56,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 628 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:56,963 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 396 flow [2024-06-14 13:25:56,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-14 13:25:56,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 13:25:56,980 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 396 flow [2024-06-14 13:25:56,980 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 13:25:56,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:56,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:25:56,981 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 13:25:56,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 82105832, now seen corresponding path program 1 times [2024-06-14 13:25:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573166867] [2024-06-14 13:25:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:59,529 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 13:25:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573166867] [2024-06-14 13:25:59,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573166867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:59,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:59,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582765769] [2024-06-14 13:25:59,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:59,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:59,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:59,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 396 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 13:25:59,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:59,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:59,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:00,587 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-14 13:26:00,588 INFO L125 PetriNetUnfolderBase]: For 9925/9931 co-relation queries the response was YES. [2024-06-14 13:26:00,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7362 conditions, 1894 events. 1209/1894 cut-off events. For 9925/9931 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9043 event pairs, 391 based on Foata normal form. 8/1899 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-14 13:26:00,597 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-06-14 13:26:00,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 680 flow [2024-06-14 13:26:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:26:00,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:26:00,599 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 396 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:26:00,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 680 flow [2024-06-14 13:26:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 640 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:00,608 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 425 flow [2024-06-14 13:26:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-14 13:26:00,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-14 13:26:00,610 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 425 flow [2024-06-14 13:26:00,610 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 13:26:00,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:00,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:26:00,611 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 13:26:00,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1300024234, now seen corresponding path program 3 times [2024-06-14 13:26:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:00,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616264983] [2024-06-14 13:26:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:02,699 INFO 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 13:26:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:02,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616264983] [2024-06-14 13:26:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616264983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:02,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:02,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112134456] [2024-06-14 13:26:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:02,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:02,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:02,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 425 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 13:26:02,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:02,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:02,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:03,798 INFO L124 PetriNetUnfolderBase]: 1199/1864 cut-off events. [2024-06-14 13:26:03,798 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-14 13:26:03,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7570 conditions, 1864 events. 1199/1864 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8921 event pairs, 392 based on Foata normal form. 4/1863 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-14 13:26:03,806 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-14 13:26:03,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 665 flow [2024-06-14 13:26:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:26:03,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:26:03,808 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 425 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:26:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 665 flow [2024-06-14 13:26:03,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 598 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:03,814 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 418 flow [2024-06-14 13:26:03,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-06-14 13:26:03,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 13:26:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 418 flow [2024-06-14 13:26:03,815 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 13:26:03,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:03,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:26:03,815 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 13:26:03,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2093297910, now seen corresponding path program 2 times [2024-06-14 13:26:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:03,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838577283] [2024-06-14 13:26:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:06,307 INFO 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 13:26:06,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:06,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838577283] [2024-06-14 13:26:06,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838577283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:06,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:06,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263023697] [2024-06-14 13:26:06,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:06,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:06,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:06,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 418 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 13:26:06,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:06,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:07,353 INFO L124 PetriNetUnfolderBase]: 1219/1909 cut-off events. [2024-06-14 13:26:07,353 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-14 13:26:07,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 1909 events. 1219/1909 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9134 event pairs, 398 based on Foata normal form. 4/1910 useless extension candidates. Maximal degree in co-relation 7814. Up to 1726 conditions per place. [2024-06-14 13:26:07,364 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 72 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-14 13:26:07,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 688 flow [2024-06-14 13:26:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:26:07,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:26:07,366 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 418 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:26:07,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 688 flow [2024-06-14 13:26:07,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 620 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:07,374 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 423 flow [2024-06-14 13:26:07,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-06-14 13:26:07,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 13:26:07,375 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 423 flow [2024-06-14 13:26:07,375 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 13:26:07,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:07,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:26:07,378 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 13:26:07,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1309791350, now seen corresponding path program 3 times [2024-06-14 13:26:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:07,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501069649] [2024-06-14 13:26:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:09,835 INFO 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 13:26:09,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501069649] [2024-06-14 13:26:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501069649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:09,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:09,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315869042] [2024-06-14 13:26:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:09,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 423 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 13:26:09,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:09,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:09,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:10,687 INFO L124 PetriNetUnfolderBase]: 1211/1903 cut-off events. [2024-06-14 13:26:10,687 INFO L125 PetriNetUnfolderBase]: For 14745/14745 co-relation queries the response was YES. [2024-06-14 13:26:10,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7956 conditions, 1903 events. 1211/1903 cut-off events. For 14745/14745 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9181 event pairs, 366 based on Foata normal form. 4/1904 useless extension candidates. Maximal degree in co-relation 7926. Up to 1642 conditions per place. [2024-06-14 13:26:10,697 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 69 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-14 13:26:10,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 701 flow [2024-06-14 13:26:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:26:10,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:26:10,699 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 423 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:26:10,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 701 flow [2024-06-14 13:26:10,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 97 transitions, 646 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:10,708 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 455 flow [2024-06-14 13:26:10,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-06-14 13:26:10,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 13:26:10,709 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 455 flow [2024-06-14 13:26:10,709 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 13:26:10,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:10,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:10,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:26:10,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:10,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:10,710 INFO L85 PathProgramCache]: Analyzing trace with hash -531738280, now seen corresponding path program 1 times [2024-06-14 13:26:10,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:10,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481177372] [2024-06-14 13:26:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:12,478 INFO 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 13:26:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481177372] [2024-06-14 13:26:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481177372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:12,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:12,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:26:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144106100] [2024-06-14 13:26:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:26:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:26:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:26:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:13,178 INFO L124 PetriNetUnfolderBase]: 1208/1906 cut-off events. [2024-06-14 13:26:13,178 INFO L125 PetriNetUnfolderBase]: For 16387/16387 co-relation queries the response was YES. [2024-06-14 13:26:13,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1906 events. 1208/1906 cut-off events. For 16387/16387 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9201 event pairs, 434 based on Foata normal form. 1/1906 useless extension candidates. Maximal degree in co-relation 8154. Up to 1820 conditions per place. [2024-06-14 13:26:13,186 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 70 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-14 13:26:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 653 flow [2024-06-14 13:26:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-14 13:26:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:26:13,188 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 455 flow. Second operand 5 states and 85 transitions. [2024-06-14 13:26:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 653 flow [2024-06-14 13:26:13,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 584 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:13,197 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 432 flow [2024-06-14 13:26:13,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-14 13:26:13,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 13:26:13,198 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 432 flow [2024-06-14 13:26:13,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:13,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:13,198 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 13:26:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:26:13,199 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 13:26:13,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 695984487, now seen corresponding path program 1 times [2024-06-14 13:26:13,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:13,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694595213] [2024-06-14 13:26:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:15,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694595213] [2024-06-14 13:26:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694595213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858110400] [2024-06-14 13:26:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:15,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:15,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 432 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 13:26:15,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:15,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:15,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:16,299 INFO L124 PetriNetUnfolderBase]: 1230/1926 cut-off events. [2024-06-14 13:26:16,299 INFO L125 PetriNetUnfolderBase]: For 18033/18033 co-relation queries the response was YES. [2024-06-14 13:26:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 1926 events. 1230/1926 cut-off events. For 18033/18033 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9237 event pairs, 444 based on Foata normal form. 6/1927 useless extension candidates. Maximal degree in co-relation 8424. Up to 1749 conditions per place. [2024-06-14 13:26:16,309 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 73 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-14 13:26:16,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 750 flow [2024-06-14 13:26:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:26:16,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:26:16,322 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 432 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:26:16,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 750 flow [2024-06-14 13:26:16,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 726 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:16,331 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 528 flow [2024-06-14 13:26:16,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-14 13:26:16,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 13:26:16,332 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 528 flow [2024-06-14 13:26:16,333 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 13:26:16,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:16,333 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 13:26:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:26:16,333 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 13:26:16,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash -487075317, now seen corresponding path program 1 times [2024-06-14 13:26:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926817589] [2024-06-14 13:26:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:16,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:17,996 INFO 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 13:26:17,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926817589] [2024-06-14 13:26:17,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926817589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:17,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:17,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:17,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736279139] [2024-06-14 13:26:17,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:18,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:18,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 528 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 13:26:18,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:18,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:18,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:19,163 INFO L124 PetriNetUnfolderBase]: 1485/2365 cut-off events. [2024-06-14 13:26:19,163 INFO L125 PetriNetUnfolderBase]: For 26089/26089 co-relation queries the response was YES. [2024-06-14 13:26:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11060 conditions, 2365 events. 1485/2365 cut-off events. For 26089/26089 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12149 event pairs, 494 based on Foata normal form. 16/2380 useless extension candidates. Maximal degree in co-relation 11026. Up to 1851 conditions per place. [2024-06-14 13:26:19,174 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 27 changer transitions 0/160 dead transitions. [2024-06-14 13:26:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 160 transitions, 1178 flow [2024-06-14 13:26:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:26:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:26:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-14 13:26:19,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-14 13:26:19,176 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 528 flow. Second operand 11 states and 208 transitions. [2024-06-14 13:26:19,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 160 transitions, 1178 flow [2024-06-14 13:26:19,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1141 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:19,191 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 682 flow [2024-06-14 13:26:19,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-14 13:26:19,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 13:26:19,191 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 682 flow [2024-06-14 13:26:19,192 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 13:26:19,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:19,192 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 13:26:19,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:26:19,192 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 13:26:19,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1303875783, now seen corresponding path program 2 times [2024-06-14 13:26:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797295749] [2024-06-14 13:26:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:19,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:21,488 INFO 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 13:26:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797295749] [2024-06-14 13:26:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797295749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:21,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:21,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:21,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594623695] [2024-06-14 13:26:21,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:21,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:21,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:21,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 682 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 13:26:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:21,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:22,754 INFO L124 PetriNetUnfolderBase]: 1677/2689 cut-off events. [2024-06-14 13:26:22,754 INFO L125 PetriNetUnfolderBase]: For 35057/35057 co-relation queries the response was YES. [2024-06-14 13:26:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13310 conditions, 2689 events. 1677/2689 cut-off events. For 35057/35057 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14338 event pairs, 433 based on Foata normal form. 16/2704 useless extension candidates. Maximal degree in co-relation 13271. Up to 1829 conditions per place. [2024-06-14 13:26:22,768 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-06-14 13:26:22,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 149 transitions, 1258 flow [2024-06-14 13:26:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:26:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:26:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:26:22,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:26:22,771 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 682 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:26:22,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 149 transitions, 1258 flow [2024-06-14 13:26:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 1219 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:22,795 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 761 flow [2024-06-14 13:26:22,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=761, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-06-14 13:26:22,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 13:26:22,796 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 761 flow [2024-06-14 13:26:22,796 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 13:26:22,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:22,797 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 13:26:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:26:22,797 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 13:26:22,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1416960617, now seen corresponding path program 3 times [2024-06-14 13:26:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964611450] [2024-06-14 13:26:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:25,169 INFO 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 13:26:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964611450] [2024-06-14 13:26:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964611450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:25,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127508904] [2024-06-14 13:26:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:25,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:25,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 761 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 13:26:25,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:25,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:25,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:26,354 INFO L124 PetriNetUnfolderBase]: 1605/2569 cut-off events. [2024-06-14 13:26:26,354 INFO L125 PetriNetUnfolderBase]: For 35207/35207 co-relation queries the response was YES. [2024-06-14 13:26:26,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12444 conditions, 2569 events. 1605/2569 cut-off events. For 35207/35207 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13533 event pairs, 547 based on Foata normal form. 40/2608 useless extension candidates. Maximal degree in co-relation 12403. Up to 2101 conditions per place. [2024-06-14 13:26:26,367 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 111 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2024-06-14 13:26:26,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1167 flow [2024-06-14 13:26:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:26:26,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:26:26,368 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 761 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:26:26,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1167 flow [2024-06-14 13:26:26,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1100 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:26,398 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 748 flow [2024-06-14 13:26:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=748, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-06-14 13:26:26,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 13:26:26,399 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 748 flow [2024-06-14 13:26:26,399 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 13:26:26,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:26,400 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 13:26:26,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:26:26,400 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 13:26:26,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1587663047, now seen corresponding path program 4 times [2024-06-14 13:26:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713837657] [2024-06-14 13:26:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:28,704 INFO 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 13:26:28,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:28,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713837657] [2024-06-14 13:26:28,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713837657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:28,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:28,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357992819] [2024-06-14 13:26:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:28,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:28,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:28,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 748 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 13:26:28,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:28,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:28,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:30,053 INFO L124 PetriNetUnfolderBase]: 1693/2729 cut-off events. [2024-06-14 13:26:30,054 INFO L125 PetriNetUnfolderBase]: For 32046/32052 co-relation queries the response was YES. [2024-06-14 13:26:30,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12933 conditions, 2729 events. 1693/2729 cut-off events. For 32046/32052 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14612 event pairs, 458 based on Foata normal form. 24/2750 useless extension candidates. Maximal degree in co-relation 12891. Up to 2267 conditions per place. [2024-06-14 13:26:30,071 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 101 selfloop transitions, 33 changer transitions 0/139 dead transitions. [2024-06-14 13:26:30,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1180 flow [2024-06-14 13:26:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:26:30,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:26:30,073 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 748 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:26:30,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1180 flow [2024-06-14 13:26:30,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1126 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:30,093 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 795 flow [2024-06-14 13:26:30,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=795, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2024-06-14 13:26:30,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 13:26:30,094 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 795 flow [2024-06-14 13:26:30,094 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 13:26:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:30,095 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 13:26:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:26:30,095 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 13:26:30,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1594334247, now seen corresponding path program 1 times [2024-06-14 13:26:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687315157] [2024-06-14 13:26:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:32,751 INFO 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 13:26:32,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:32,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687315157] [2024-06-14 13:26:32,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687315157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:32,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198590649] [2024-06-14 13:26:32,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:32,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:32,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:32,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:32,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 795 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 13:26:32,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:32,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:32,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:34,058 INFO L124 PetriNetUnfolderBase]: 1741/2807 cut-off events. [2024-06-14 13:26:34,058 INFO L125 PetriNetUnfolderBase]: For 34748/34754 co-relation queries the response was YES. [2024-06-14 13:26:34,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13520 conditions, 2807 events. 1741/2807 cut-off events. For 34748/34754 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15248 event pairs, 447 based on Foata normal form. 16/2820 useless extension candidates. Maximal degree in co-relation 13477. Up to 1953 conditions per place. [2024-06-14 13:26:34,073 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-14 13:26:34,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1247 flow [2024-06-14 13:26:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:26:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:26:34,075 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 795 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:26:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1247 flow [2024-06-14 13:26:34,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 142 transitions, 1170 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:34,096 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 828 flow [2024-06-14 13:26:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=828, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-06-14 13:26:34,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 13:26:34,096 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 828 flow [2024-06-14 13:26:34,097 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 13:26:34,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:34,097 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 13:26:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:26:34,097 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:34,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 100284793, now seen corresponding path program 1 times [2024-06-14 13:26:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:34,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351824755] [2024-06-14 13:26:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:36,160 INFO 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 13:26:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:36,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351824755] [2024-06-14 13:26:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351824755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:36,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98561011] [2024-06-14 13:26:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:36,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 828 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 13:26:36,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:36,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:36,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:37,174 INFO L124 PetriNetUnfolderBase]: 1751/2835 cut-off events. [2024-06-14 13:26:37,174 INFO L125 PetriNetUnfolderBase]: For 35570/35570 co-relation queries the response was YES. [2024-06-14 13:26:37,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13733 conditions, 2835 events. 1751/2835 cut-off events. For 35570/35570 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15546 event pairs, 599 based on Foata normal form. 2/2836 useless extension candidates. Maximal degree in co-relation 13689. Up to 2605 conditions per place. [2024-06-14 13:26:37,187 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-14 13:26:37,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1232 flow [2024-06-14 13:26:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:26:37,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:26:37,188 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 828 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:26:37,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1232 flow [2024-06-14 13:26:37,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 126 transitions, 1140 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:37,209 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 824 flow [2024-06-14 13:26:37,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=824, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-06-14 13:26:37,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 13:26:37,210 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 824 flow [2024-06-14 13:26:37,210 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 13:26:37,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:37,210 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 13:26:37,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:26:37,210 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 13:26:37,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 630758357, now seen corresponding path program 5 times [2024-06-14 13:26:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452924914] [2024-06-14 13:26:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:37,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:39,517 INFO 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 13:26:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:39,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452924914] [2024-06-14 13:26:39,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452924914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:39,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:39,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008969539] [2024-06-14 13:26:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:39,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:39,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 824 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 13:26:39,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:39,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:40,850 INFO L124 PetriNetUnfolderBase]: 1783/2888 cut-off events. [2024-06-14 13:26:40,850 INFO L125 PetriNetUnfolderBase]: For 39479/39479 co-relation queries the response was YES. [2024-06-14 13:26:40,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13774 conditions, 2888 events. 1783/2888 cut-off events. For 39479/39479 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15928 event pairs, 487 based on Foata normal form. 20/2901 useless extension candidates. Maximal degree in co-relation 13729. Up to 2425 conditions per place. [2024-06-14 13:26:40,865 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 101 selfloop transitions, 33 changer transitions 0/139 dead transitions. [2024-06-14 13:26:40,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1246 flow [2024-06-14 13:26:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:26:40,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:26:40,867 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 824 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:26:40,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1246 flow [2024-06-14 13:26:40,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1203 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:40,887 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 886 flow [2024-06-14 13:26:40,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=886, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2024-06-14 13:26:40,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 13:26:40,887 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 886 flow [2024-06-14 13:26:40,887 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 13:26:40,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:40,888 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 13:26:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:26:40,888 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 13:26:40,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -989225, now seen corresponding path program 2 times [2024-06-14 13:26:40,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:40,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442114753] [2024-06-14 13:26:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:43,559 INFO 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 13:26:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442114753] [2024-06-14 13:26:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442114753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411732644] [2024-06-14 13:26:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:43,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:43,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 886 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 13:26:43,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:44,623 INFO L124 PetriNetUnfolderBase]: 1831/2978 cut-off events. [2024-06-14 13:26:44,623 INFO L125 PetriNetUnfolderBase]: For 43304/43304 co-relation queries the response was YES. [2024-06-14 13:26:44,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14438 conditions, 2978 events. 1831/2978 cut-off events. For 43304/43304 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16690 event pairs, 487 based on Foata normal form. 12/2983 useless extension candidates. Maximal degree in co-relation 14392. Up to 2403 conditions per place. [2024-06-14 13:26:44,638 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-06-14 13:26:44,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 142 transitions, 1328 flow [2024-06-14 13:26:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:26:44,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:26:44,640 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 886 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:26:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 142 transitions, 1328 flow [2024-06-14 13:26:44,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 142 transitions, 1247 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:44,666 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 915 flow [2024-06-14 13:26:44,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-14 13:26:44,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:26:44,666 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 915 flow [2024-06-14 13:26:44,666 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 13:26:44,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:44,667 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 13:26:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:26:44,667 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 13:26:44,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 284110645, now seen corresponding path program 3 times [2024-06-14 13:26:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:44,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445579627] [2024-06-14 13:26:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:47,339 INFO 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 13:26:47,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445579627] [2024-06-14 13:26:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445579627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:47,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113806399] [2024-06-14 13:26:47,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:47,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:47,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:47,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:47,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 915 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 13:26:47,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:47,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:47,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:48,478 INFO L124 PetriNetUnfolderBase]: 1811/2958 cut-off events. [2024-06-14 13:26:48,478 INFO L125 PetriNetUnfolderBase]: For 42350/42350 co-relation queries the response was YES. [2024-06-14 13:26:48,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14047 conditions, 2958 events. 1811/2958 cut-off events. For 42350/42350 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16551 event pairs, 434 based on Foata normal form. 12/2963 useless extension candidates. Maximal degree in co-relation 14000. Up to 1693 conditions per place. [2024-06-14 13:26:48,491 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 93 selfloop transitions, 43 changer transitions 0/141 dead transitions. [2024-06-14 13:26:48,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 141 transitions, 1283 flow [2024-06-14 13:26:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:26:48,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:26:48,493 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 915 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:26:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 141 transitions, 1283 flow [2024-06-14 13:26:48,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 141 transitions, 1191 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:48,521 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 873 flow [2024-06-14 13:26:48,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=873, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-06-14 13:26:48,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 13:26:48,522 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 873 flow [2024-06-14 13:26:48,522 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 13:26:48,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:48,522 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 13:26:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:26:48,522 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 100670743, now seen corresponding path program 2 times [2024-06-14 13:26:48,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222201649] [2024-06-14 13:26:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:50,779 INFO 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 13:26:50,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:50,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222201649] [2024-06-14 13:26:50,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222201649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:50,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:50,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969297243] [2024-06-14 13:26:50,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:50,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:50,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 873 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 13:26:50,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:50,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:50,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:51,799 INFO L124 PetriNetUnfolderBase]: 1785/2914 cut-off events. [2024-06-14 13:26:51,799 INFO L125 PetriNetUnfolderBase]: For 42114/42114 co-relation queries the response was YES. [2024-06-14 13:26:51,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13834 conditions, 2914 events. 1785/2914 cut-off events. For 42114/42114 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16338 event pairs, 585 based on Foata normal form. 6/2913 useless extension candidates. Maximal degree in co-relation 13786. Up to 2698 conditions per place. [2024-06-14 13:26:51,815 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-14 13:26:51,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 117 transitions, 1153 flow [2024-06-14 13:26:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:26:51,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:26:51,817 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 873 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:26:51,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 117 transitions, 1153 flow [2024-06-14 13:26:51,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 117 transitions, 1014 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:51,842 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 790 flow [2024-06-14 13:26:51,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2024-06-14 13:26:51,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:26:51,842 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 790 flow [2024-06-14 13:26:51,843 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 13:26:51,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:51,843 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 13:26:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:26:51,843 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:51,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1211236045, now seen corresponding path program 1 times [2024-06-14 13:26:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:51,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066198685] [2024-06-14 13:26:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:53,837 INFO 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 13:26:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066198685] [2024-06-14 13:26:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066198685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:53,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:53,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496618442] [2024-06-14 13:26:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:53,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 790 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 13:26:53,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:53,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:54,839 INFO L124 PetriNetUnfolderBase]: 1795/2933 cut-off events. [2024-06-14 13:26:54,839 INFO L125 PetriNetUnfolderBase]: For 41387/41387 co-relation queries the response was YES. [2024-06-14 13:26:54,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13517 conditions, 2933 events. 1795/2933 cut-off events. For 41387/41387 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16539 event pairs, 623 based on Foata normal form. 2/2934 useless extension candidates. Maximal degree in co-relation 13469. Up to 2776 conditions per place. [2024-06-14 13:26:54,855 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 105 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-14 13:26:54,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 126 transitions, 1188 flow [2024-06-14 13:26:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:26:54,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:26:54,857 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 790 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:26:54,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 126 transitions, 1188 flow [2024-06-14 13:26:54,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 1117 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:54,883 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 819 flow [2024-06-14 13:26:54,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=819, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2024-06-14 13:26:54,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:26:54,884 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 819 flow [2024-06-14 13:26:54,884 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 13:26:54,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:54,884 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 13:26:54,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:26:54,884 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 13:26:54,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash 759356697, now seen corresponding path program 2 times [2024-06-14 13:26:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:54,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035153482] [2024-06-14 13:26:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:54,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035153482] [2024-06-14 13:26:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035153482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90922536] [2024-06-14 13:26:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:57,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:26:57,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 819 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 13:26:57,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:57,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:26:57,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:57,968 INFO L124 PetriNetUnfolderBase]: 1789/2919 cut-off events. [2024-06-14 13:26:57,968 INFO L125 PetriNetUnfolderBase]: For 44201/44201 co-relation queries the response was YES. [2024-06-14 13:26:57,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13748 conditions, 2919 events. 1789/2919 cut-off events. For 44201/44201 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16452 event pairs, 659 based on Foata normal form. 2/2920 useless extension candidates. Maximal degree in co-relation 13699. Up to 2801 conditions per place. [2024-06-14 13:26:57,985 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 104 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-06-14 13:26:57,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 120 transitions, 1083 flow [2024-06-14 13:26:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:26:57,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 13:26:57,987 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 819 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:26:57,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 120 transitions, 1083 flow [2024-06-14 13:26:58,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 120 transitions, 1039 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:58,012 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 803 flow [2024-06-14 13:26:58,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=803, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2024-06-14 13:26:58,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-14 13:26:58,012 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 803 flow [2024-06-14 13:26:58,013 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 13:26:58,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:58,013 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 13:26:58,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:26:58,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:26:58,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1321566616, now seen corresponding path program 1 times [2024-06-14 13:26:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:58,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232873432] [2024-06-14 13:26:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:00,679 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 13:27:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232873432] [2024-06-14 13:27:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232873432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:00,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:00,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734910392] [2024-06-14 13:27:00,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:00,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:00,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:00,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:00,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:00,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 803 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 13:27:00,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:00,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:00,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:01,929 INFO L124 PetriNetUnfolderBase]: 1885/3068 cut-off events. [2024-06-14 13:27:01,929 INFO L125 PetriNetUnfolderBase]: For 51569/51569 co-relation queries the response was YES. [2024-06-14 13:27:01,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14582 conditions, 3068 events. 1885/3068 cut-off events. For 51569/51569 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17398 event pairs, 611 based on Foata normal form. 8/3073 useless extension candidates. Maximal degree in co-relation 14531. Up to 2634 conditions per place. [2024-06-14 13:27:01,944 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-14 13:27:01,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 154 transitions, 1445 flow [2024-06-14 13:27:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:27:01,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:27:01,945 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 803 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:27:01,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 154 transitions, 1445 flow [2024-06-14 13:27:01,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1411 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:01,974 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1024 flow [2024-06-14 13:27:01,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1024, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-06-14 13:27:01,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 13:27:01,974 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1024 flow [2024-06-14 13:27:01,974 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 13:27:01,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:01,975 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 13:27:01,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:27:01,975 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 13:27:01,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2065223110, now seen corresponding path program 2 times [2024-06-14 13:27:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:01,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578704586] [2024-06-14 13:27:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:04,625 INFO 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 13:27:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578704586] [2024-06-14 13:27:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578704586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800445210] [2024-06-14 13:27:04,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:04,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:04,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1024 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 13:27:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:05,610 INFO L124 PetriNetUnfolderBase]: 2009/3232 cut-off events. [2024-06-14 13:27:05,611 INFO L125 PetriNetUnfolderBase]: For 60845/60845 co-relation queries the response was YES. [2024-06-14 13:27:05,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 3232 events. 2009/3232 cut-off events. For 60845/60845 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18164 event pairs, 596 based on Foata normal form. 12/3237 useless extension candidates. Maximal degree in co-relation 16309. Up to 2820 conditions per place. [2024-06-14 13:27:05,629 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 108 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-14 13:27:05,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 155 transitions, 1558 flow [2024-06-14 13:27:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:27:05,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:27:05,630 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1024 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:27:05,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 155 transitions, 1558 flow [2024-06-14 13:27:05,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1504 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-14 13:27:05,672 INFO L231 Difference]: Finished difference. Result has 121 places, 136 transitions, 1210 flow [2024-06-14 13:27:05,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1210, PETRI_PLACES=121, PETRI_TRANSITIONS=136} [2024-06-14 13:27:05,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 13:27:05,673 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 136 transitions, 1210 flow [2024-06-14 13:27:05,673 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 13:27:05,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:05,673 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 13:27:05,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:27:05,673 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 13:27:05,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:05,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1173749626, now seen corresponding path program 3 times [2024-06-14 13:27:05,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:05,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218731455] [2024-06-14 13:27:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:08,513 INFO 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 13:27:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218731455] [2024-06-14 13:27:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218731455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:08,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:08,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655830126] [2024-06-14 13:27:08,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:08,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:08,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:08,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 1210 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 13:27:08,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:08,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:08,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:09,664 INFO L124 PetriNetUnfolderBase]: 2037/3280 cut-off events. [2024-06-14 13:27:09,665 INFO L125 PetriNetUnfolderBase]: For 65469/65469 co-relation queries the response was YES. [2024-06-14 13:27:09,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17218 conditions, 3280 events. 2037/3280 cut-off events. For 65469/65469 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18420 event pairs, 594 based on Foata normal form. 12/3285 useless extension candidates. Maximal degree in co-relation 17160. Up to 2848 conditions per place. [2024-06-14 13:27:09,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 53 changer transitions 0/167 dead transitions. [2024-06-14 13:27:09,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 167 transitions, 1749 flow [2024-06-14 13:27:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:27:09,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:27:09,688 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 1210 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:27:09,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 167 transitions, 1749 flow [2024-06-14 13:27:09,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 167 transitions, 1630 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:09,729 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1306 flow [2024-06-14 13:27:09,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1306, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-14 13:27:09,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 13:27:09,730 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1306 flow [2024-06-14 13:27:09,730 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 13:27:09,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:09,730 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 13:27:09,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:27:09,731 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 13:27:09,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1173741690, now seen corresponding path program 1 times [2024-06-14 13:27:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:09,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32858792] [2024-06-14 13:27:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:09,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:12,912 INFO 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 13:27:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32858792] [2024-06-14 13:27:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32858792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:12,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433682189] [2024-06-14 13:27:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:12,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:12,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:12,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1306 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 13:27:12,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:12,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:12,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:14,114 INFO L124 PetriNetUnfolderBase]: 2076/3333 cut-off events. [2024-06-14 13:27:14,115 INFO L125 PetriNetUnfolderBase]: For 69795/69795 co-relation queries the response was YES. [2024-06-14 13:27:14,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17532 conditions, 3333 events. 2076/3333 cut-off events. For 69795/69795 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18731 event pairs, 609 based on Foata normal form. 14/3340 useless extension candidates. Maximal degree in co-relation 17472. Up to 3055 conditions per place. [2024-06-14 13:27:14,139 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 129 selfloop transitions, 32 changer transitions 0/166 dead transitions. [2024-06-14 13:27:14,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 166 transitions, 1743 flow [2024-06-14 13:27:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:27:14,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:27:14,140 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1306 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:27:14,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 166 transitions, 1743 flow [2024-06-14 13:27:14,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 166 transitions, 1601 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:14,198 INFO L231 Difference]: Finished difference. Result has 127 places, 145 transitions, 1271 flow [2024-06-14 13:27:14,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1271, PETRI_PLACES=127, PETRI_TRANSITIONS=145} [2024-06-14 13:27:14,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 13:27:14,198 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 145 transitions, 1271 flow [2024-06-14 13:27:14,199 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 13:27:14,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:14,199 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 13:27:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:27:14,199 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:14,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -179292520, now seen corresponding path program 1 times [2024-06-14 13:27:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124589070] [2024-06-14 13:27:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:16,256 INFO 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 13:27:16,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124589070] [2024-06-14 13:27:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124589070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704252543] [2024-06-14 13:27:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:16,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:16,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 145 transitions, 1271 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 13:27:16,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:16,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:16,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:17,563 INFO L124 PetriNetUnfolderBase]: 2200/3548 cut-off events. [2024-06-14 13:27:17,564 INFO L125 PetriNetUnfolderBase]: For 70390/70393 co-relation queries the response was YES. [2024-06-14 13:27:17,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18551 conditions, 3548 events. 2200/3548 cut-off events. For 70390/70393 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20218 event pairs, 653 based on Foata normal form. 4/3549 useless extension candidates. Maximal degree in co-relation 18490. Up to 2949 conditions per place. [2024-06-14 13:27:17,588 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 144 selfloop transitions, 65 changer transitions 0/214 dead transitions. [2024-06-14 13:27:17,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 214 transitions, 2268 flow [2024-06-14 13:27:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:27:17,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 13:27:17,589 INFO L175 Difference]: Start difference. First operand has 127 places, 145 transitions, 1271 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:27:17,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 214 transitions, 2268 flow [2024-06-14 13:27:17,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 214 transitions, 2173 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:17,643 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1643 flow [2024-06-14 13:27:17,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1643, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-14 13:27:17,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 13:27:17,643 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1643 flow [2024-06-14 13:27:17,644 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 13:27:17,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:17,644 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 13:27:17,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:27:17,644 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:17,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:17,644 INFO L85 PathProgramCache]: Analyzing trace with hash -141621194, now seen corresponding path program 2 times [2024-06-14 13:27:17,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:17,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339009512] [2024-06-14 13:27:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:17,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339009512] [2024-06-14 13:27:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339009512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:19,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:19,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:19,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781494737] [2024-06-14 13:27:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:19,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:19,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:19,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:19,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1643 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 13:27:19,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:19,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:19,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:21,301 INFO L124 PetriNetUnfolderBase]: 2268/3650 cut-off events. [2024-06-14 13:27:21,302 INFO L125 PetriNetUnfolderBase]: For 79288/79291 co-relation queries the response was YES. [2024-06-14 13:27:21,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19999 conditions, 3650 events. 2268/3650 cut-off events. For 79288/79291 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20792 event pairs, 665 based on Foata normal form. 6/3653 useless extension candidates. Maximal degree in co-relation 19934. Up to 2994 conditions per place. [2024-06-14 13:27:21,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 133 selfloop transitions, 77 changer transitions 0/215 dead transitions. [2024-06-14 13:27:21,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 215 transitions, 2430 flow [2024-06-14 13:27:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 13:27:21,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 13:27:21,328 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1643 flow. Second operand 7 states and 138 transitions. [2024-06-14 13:27:21,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 215 transitions, 2430 flow [2024-06-14 13:27:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 215 transitions, 2374 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-14 13:27:21,394 INFO L231 Difference]: Finished difference. Result has 139 places, 182 transitions, 1895 flow [2024-06-14 13:27:21,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1895, PETRI_PLACES=139, PETRI_TRANSITIONS=182} [2024-06-14 13:27:21,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 13:27:21,394 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 182 transitions, 1895 flow [2024-06-14 13:27:21,395 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 13:27:21,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:21,395 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 13:27:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:27:21,395 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:21,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash -136859594, now seen corresponding path program 3 times [2024-06-14 13:27:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9803181] [2024-06-14 13:27:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:21,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:23,818 INFO 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 13:27:23,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9803181] [2024-06-14 13:27:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9803181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:23,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870691892] [2024-06-14 13:27:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:23,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:23,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 182 transitions, 1895 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 13:27:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:23,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:25,082 INFO L124 PetriNetUnfolderBase]: 2282/3644 cut-off events. [2024-06-14 13:27:25,082 INFO L125 PetriNetUnfolderBase]: For 85026/85026 co-relation queries the response was YES. [2024-06-14 13:27:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20577 conditions, 3644 events. 2282/3644 cut-off events. For 85026/85026 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20594 event pairs, 657 based on Foata normal form. 6/3649 useless extension candidates. Maximal degree in co-relation 20509. Up to 3365 conditions per place. [2024-06-14 13:27:25,157 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 163 selfloop transitions, 44 changer transitions 0/212 dead transitions. [2024-06-14 13:27:25,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 212 transitions, 2476 flow [2024-06-14 13:27:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:27:25,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:27:25,158 INFO L175 Difference]: Start difference. First operand has 139 places, 182 transitions, 1895 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:27:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 212 transitions, 2476 flow [2024-06-14 13:27:25,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 212 transitions, 2344 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:25,223 INFO L231 Difference]: Finished difference. Result has 142 places, 188 transitions, 1959 flow [2024-06-14 13:27:25,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1959, PETRI_PLACES=142, PETRI_TRANSITIONS=188} [2024-06-14 13:27:25,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 13:27:25,223 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 188 transitions, 1959 flow [2024-06-14 13:27:25,223 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 13:27:25,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:25,223 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 13:27:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:27:25,224 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:25,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -633025358, now seen corresponding path program 4 times [2024-06-14 13:27:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546715236] [2024-06-14 13:27:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:25,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:27,574 INFO 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 13:27:27,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:27,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546715236] [2024-06-14 13:27:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546715236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:27,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:27,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007429251] [2024-06-14 13:27:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:27,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:27,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:27,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 188 transitions, 1959 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 13:27:27,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:27,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:28,945 INFO L124 PetriNetUnfolderBase]: 2286/3671 cut-off events. [2024-06-14 13:27:28,945 INFO L125 PetriNetUnfolderBase]: For 83184/83184 co-relation queries the response was YES. [2024-06-14 13:27:28,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 3671 events. 2286/3671 cut-off events. For 83184/83184 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20906 event pairs, 650 based on Foata normal form. 4/3671 useless extension candidates. Maximal degree in co-relation 20298. Up to 3014 conditions per place. [2024-06-14 13:27:28,973 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 73 changer transitions 0/220 dead transitions. [2024-06-14 13:27:28,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2647 flow [2024-06-14 13:27:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:27:28,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:27:28,975 INFO L175 Difference]: Start difference. First operand has 142 places, 188 transitions, 1959 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:27:28,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2647 flow [2024-06-14 13:27:29,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 220 transitions, 2533 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:29,040 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 2040 flow [2024-06-14 13:27:29,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2040, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-06-14 13:27:29,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 13:27:29,041 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 2040 flow [2024-06-14 13:27:29,041 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 13:27:29,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:29,041 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 13:27:29,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:27:29,041 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:29,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1969996440, now seen corresponding path program 5 times [2024-06-14 13:27:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:29,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480201018] [2024-06-14 13:27:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:29,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:31,462 INFO 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 13:27:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480201018] [2024-06-14 13:27:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480201018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663894158] [2024-06-14 13:27:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:31,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 2040 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 13:27:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:31,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:31,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:32,864 INFO L124 PetriNetUnfolderBase]: 2260/3635 cut-off events. [2024-06-14 13:27:32,864 INFO L125 PetriNetUnfolderBase]: For 86069/86069 co-relation queries the response was YES. [2024-06-14 13:27:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20363 conditions, 3635 events. 2260/3635 cut-off events. For 86069/86069 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20767 event pairs, 649 based on Foata normal form. 6/3637 useless extension candidates. Maximal degree in co-relation 20294. Up to 2995 conditions per place. [2024-06-14 13:27:32,886 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 69 changer transitions 0/216 dead transitions. [2024-06-14 13:27:32,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 216 transitions, 2604 flow [2024-06-14 13:27:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:27:32,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:27:32,888 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 2040 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:27:32,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 216 transitions, 2604 flow [2024-06-14 13:27:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 216 transitions, 2509 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:32,964 INFO L231 Difference]: Finished difference. Result has 148 places, 191 transitions, 2091 flow [2024-06-14 13:27:32,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2091, PETRI_PLACES=148, PETRI_TRANSITIONS=191} [2024-06-14 13:27:32,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 13:27:32,964 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 191 transitions, 2091 flow [2024-06-14 13:27:32,965 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 13:27:32,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:32,965 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 13:27:32,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:27:32,965 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:32,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash -409271144, now seen corresponding path program 6 times [2024-06-14 13:27:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684850214] [2024-06-14 13:27:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:35,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684850214] [2024-06-14 13:27:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684850214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:35,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:35,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149929754] [2024-06-14 13:27:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:35,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:35,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:35,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 191 transitions, 2091 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 13:27:35,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:35,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:35,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:36,858 INFO L124 PetriNetUnfolderBase]: 2216/3558 cut-off events. [2024-06-14 13:27:36,858 INFO L125 PetriNetUnfolderBase]: For 87619/87619 co-relation queries the response was YES. [2024-06-14 13:27:36,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19771 conditions, 3558 events. 2216/3558 cut-off events. For 87619/87619 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20191 event pairs, 612 based on Foata normal form. 12/3562 useless extension candidates. Maximal degree in co-relation 19701. Up to 3060 conditions per place. [2024-06-14 13:27:36,884 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 66 changer transitions 0/216 dead transitions. [2024-06-14 13:27:36,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 216 transitions, 2660 flow [2024-06-14 13:27:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:27:36,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:27:36,886 INFO L175 Difference]: Start difference. First operand has 148 places, 191 transitions, 2091 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:27:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 216 transitions, 2660 flow [2024-06-14 13:27:36,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 216 transitions, 2488 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:36,961 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 2065 flow [2024-06-14 13:27:36,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2065, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-06-14 13:27:36,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 13:27:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 2065 flow [2024-06-14 13:27:36,962 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 13:27:36,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:36,962 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 13:27:36,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:27:36,963 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 13:27:36,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 53638740, now seen corresponding path program 7 times [2024-06-14 13:27:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:36,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310860653] [2024-06-14 13:27:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:39,752 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 13:27:39,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310860653] [2024-06-14 13:27:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310860653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:39,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:39,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:39,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248166838] [2024-06-14 13:27:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:39,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:39,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 2065 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 13:27:39,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:39,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:39,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:40,766 INFO L124 PetriNetUnfolderBase]: 2190/3518 cut-off events. [2024-06-14 13:27:40,766 INFO L125 PetriNetUnfolderBase]: For 83173/83173 co-relation queries the response was YES. [2024-06-14 13:27:40,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19368 conditions, 3518 events. 2190/3518 cut-off events. For 83173/83173 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19997 event pairs, 614 based on Foata normal form. 6/3516 useless extension candidates. Maximal degree in co-relation 19297. Up to 3041 conditions per place. [2024-06-14 13:27:40,793 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 60 changer transitions 0/209 dead transitions. [2024-06-14 13:27:40,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2527 flow [2024-06-14 13:27:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:27:40,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:27:40,794 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 2065 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:27:40,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2527 flow [2024-06-14 13:27:40,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 209 transitions, 2324 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:27:40,872 INFO L231 Difference]: Finished difference. Result has 150 places, 191 transitions, 1991 flow [2024-06-14 13:27:40,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1991, PETRI_PLACES=150, PETRI_TRANSITIONS=191} [2024-06-14 13:27:40,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 13:27:40,873 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 191 transitions, 1991 flow [2024-06-14 13:27:40,873 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 13:27:40,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:40,873 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 13:27:40,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:27:40,873 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:40,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1978247958, now seen corresponding path program 1 times [2024-06-14 13:27:40,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:40,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082516230] [2024-06-14 13:27:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:40,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:43,686 INFO 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 13:27:43,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:43,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082516230] [2024-06-14 13:27:43,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082516230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:43,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:43,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430432208] [2024-06-14 13:27:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:43,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:43,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 191 transitions, 1991 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 13:27:43,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:43,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:43,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:44,836 INFO L124 PetriNetUnfolderBase]: 2198/3556 cut-off events. [2024-06-14 13:27:44,837 INFO L125 PetriNetUnfolderBase]: For 83845/83845 co-relation queries the response was YES. [2024-06-14 13:27:44,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19395 conditions, 3556 events. 2198/3556 cut-off events. For 83845/83845 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20345 event pairs, 639 based on Foata normal form. 2/3557 useless extension candidates. Maximal degree in co-relation 19323. Up to 3317 conditions per place. [2024-06-14 13:27:44,864 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 193 selfloop transitions, 21 changer transitions 0/219 dead transitions. [2024-06-14 13:27:44,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2637 flow [2024-06-14 13:27:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:27:44,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:27:44,865 INFO L175 Difference]: Start difference. First operand has 150 places, 191 transitions, 1991 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:27:44,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2637 flow [2024-06-14 13:27:44,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 219 transitions, 2517 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:44,946 INFO L231 Difference]: Finished difference. Result has 151 places, 195 transitions, 1990 flow [2024-06-14 13:27:44,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1990, PETRI_PLACES=151, PETRI_TRANSITIONS=195} [2024-06-14 13:27:44,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 13:27:44,947 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 195 transitions, 1990 flow [2024-06-14 13:27:44,947 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 13:27:44,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:44,947 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 13:27:44,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:27:44,948 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:44,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1978308408, now seen corresponding path program 2 times [2024-06-14 13:27:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426730479] [2024-06-14 13:27:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:47,962 INFO 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 13:27:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426730479] [2024-06-14 13:27:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426730479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:47,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:47,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:27:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694213461] [2024-06-14 13:27:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:47,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:27:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:27:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:27:47,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:47,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 195 transitions, 1990 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 13:27:47,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:47,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:47,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:49,099 INFO L124 PetriNetUnfolderBase]: 2206/3568 cut-off events. [2024-06-14 13:27:49,100 INFO L125 PetriNetUnfolderBase]: For 87907/87907 co-relation queries the response was YES. [2024-06-14 13:27:49,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19476 conditions, 3568 events. 2206/3568 cut-off events. For 87907/87907 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20479 event pairs, 675 based on Foata normal form. 2/3569 useless extension candidates. Maximal degree in co-relation 19403. Up to 3364 conditions per place. [2024-06-14 13:27:49,128 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 193 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2024-06-14 13:27:49,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 216 transitions, 2510 flow [2024-06-14 13:27:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:27:49,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:27:49,129 INFO L175 Difference]: Start difference. First operand has 151 places, 195 transitions, 1990 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:27:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 216 transitions, 2510 flow [2024-06-14 13:27:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2442 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:49,211 INFO L231 Difference]: Finished difference. Result has 155 places, 197 transitions, 2005 flow [2024-06-14 13:27:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=155, PETRI_TRANSITIONS=197} [2024-06-14 13:27:49,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 13:27:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 197 transitions, 2005 flow [2024-06-14 13:27:49,212 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 13:27:49,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:49,212 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 13:27:49,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:27:49,213 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:49,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -402595976, now seen corresponding path program 3 times [2024-06-14 13:27:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97407215] [2024-06-14 13:27:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:52,442 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 13:27:52,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:52,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97407215] [2024-06-14 13:27:52,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97407215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:52,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:52,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896557922] [2024-06-14 13:27:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:52,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:52,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 197 transitions, 2005 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 13:27:52,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:52,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:52,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:53,495 INFO L124 PetriNetUnfolderBase]: 2201/3565 cut-off events. [2024-06-14 13:27:53,496 INFO L125 PetriNetUnfolderBase]: For 90020/90020 co-relation queries the response was YES. [2024-06-14 13:27:53,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 3565 events. 2201/3565 cut-off events. For 90020/90020 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20529 event pairs, 729 based on Foata normal form. 2/3566 useless extension candidates. Maximal degree in co-relation 19365. Up to 3387 conditions per place. [2024-06-14 13:27:53,522 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 193 selfloop transitions, 13 changer transitions 0/211 dead transitions. [2024-06-14 13:27:53,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 211 transitions, 2459 flow [2024-06-14 13:27:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:27:53,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-14 13:27:53,524 INFO L175 Difference]: Start difference. First operand has 155 places, 197 transitions, 2005 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:27:53,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 211 transitions, 2459 flow [2024-06-14 13:27:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 211 transitions, 2388 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:53,602 INFO L231 Difference]: Finished difference. Result has 157 places, 197 transitions, 1965 flow [2024-06-14 13:27:53,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1965, PETRI_PLACES=157, PETRI_TRANSITIONS=197} [2024-06-14 13:27:53,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:27:53,602 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 197 transitions, 1965 flow [2024-06-14 13:27:53,602 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 13:27:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:53,602 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 13:27:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:27:53,603 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:53,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1596399557, now seen corresponding path program 1 times [2024-06-14 13:27:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827192505] [2024-06-14 13:27:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:56,846 INFO 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 13:27:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827192505] [2024-06-14 13:27:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827192505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:56,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:56,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:56,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152767934] [2024-06-14 13:27:56,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:56,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:27:56,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 197 transitions, 1965 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 13:27:56,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:56,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:27:56,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:58,109 INFO L124 PetriNetUnfolderBase]: 2253/3635 cut-off events. [2024-06-14 13:27:58,109 INFO L125 PetriNetUnfolderBase]: For 103003/103003 co-relation queries the response was YES. [2024-06-14 13:27:58,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19839 conditions, 3635 events. 2253/3635 cut-off events. For 103003/103003 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20846 event pairs, 627 based on Foata normal form. 14/3641 useless extension candidates. Maximal degree in co-relation 19763. Up to 3296 conditions per place. [2024-06-14 13:27:58,135 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 182 selfloop transitions, 34 changer transitions 0/221 dead transitions. [2024-06-14 13:27:58,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 221 transitions, 2522 flow [2024-06-14 13:27:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:27:58,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:27:58,137 INFO L175 Difference]: Start difference. First operand has 157 places, 197 transitions, 1965 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:27:58,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 221 transitions, 2522 flow [2024-06-14 13:27:58,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 221 transitions, 2484 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:58,227 INFO L231 Difference]: Finished difference. Result has 158 places, 199 transitions, 2034 flow [2024-06-14 13:27:58,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2034, PETRI_PLACES=158, PETRI_TRANSITIONS=199} [2024-06-14 13:27:58,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 13:27:58,227 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 199 transitions, 2034 flow [2024-06-14 13:27:58,227 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 13:27:58,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:58,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:27:58,228 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:58,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1610684357, now seen corresponding path program 2 times [2024-06-14 13:27:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:58,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296865421] [2024-06-14 13:27:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:01,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296865421] [2024-06-14 13:28:01,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296865421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:01,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:01,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:01,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939092156] [2024-06-14 13:28:01,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:01,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:01,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:01,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:01,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 199 transitions, 2034 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 13:28:01,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:01,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:02,556 INFO L124 PetriNetUnfolderBase]: 2314/3718 cut-off events. [2024-06-14 13:28:02,557 INFO L125 PetriNetUnfolderBase]: For 108413/108413 co-relation queries the response was YES. [2024-06-14 13:28:02,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20850 conditions, 3718 events. 2314/3718 cut-off events. For 108413/108413 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21256 event pairs, 640 based on Foata normal form. 8/3718 useless extension candidates. Maximal degree in co-relation 20773. Up to 3236 conditions per place. [2024-06-14 13:28:02,583 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 189 selfloop transitions, 33 changer transitions 0/227 dead transitions. [2024-06-14 13:28:02,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 227 transitions, 2720 flow [2024-06-14 13:28:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:28:02,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:28:02,585 INFO L175 Difference]: Start difference. First operand has 158 places, 199 transitions, 2034 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:28:02,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 227 transitions, 2720 flow [2024-06-14 13:28:02,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 227 transitions, 2637 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:02,667 INFO L231 Difference]: Finished difference. Result has 160 places, 201 transitions, 2055 flow [2024-06-14 13:28:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2055, PETRI_PLACES=160, PETRI_TRANSITIONS=201} [2024-06-14 13:28:02,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 13:28:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 201 transitions, 2055 flow [2024-06-14 13:28:02,667 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 13:28:02,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:02,668 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] [2024-06-14 13:28:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:28:02,668 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 13:28:02,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash 351435955, now seen corresponding path program 1 times [2024-06-14 13:28:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:02,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364570616] [2024-06-14 13:28:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:06,003 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 13:28:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:06,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364570616] [2024-06-14 13:28:06,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364570616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:06,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178803513] [2024-06-14 13:28:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:06,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:06,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:06,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:06,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 201 transitions, 2055 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 13:28:06,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:06,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:07,443 INFO L124 PetriNetUnfolderBase]: 2531/4088 cut-off events. [2024-06-14 13:28:07,443 INFO L125 PetriNetUnfolderBase]: For 143099/143099 co-relation queries the response was YES. [2024-06-14 13:28:07,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23716 conditions, 4088 events. 2531/4088 cut-off events. For 143099/143099 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23890 event pairs, 662 based on Foata normal form. 16/4100 useless extension candidates. Maximal degree in co-relation 23638. Up to 2866 conditions per place. [2024-06-14 13:28:07,477 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 169 selfloop transitions, 75 changer transitions 0/249 dead transitions. [2024-06-14 13:28:07,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 249 transitions, 2971 flow [2024-06-14 13:28:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:28:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:28:07,478 INFO L175 Difference]: Start difference. First operand has 160 places, 201 transitions, 2055 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:28:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 249 transitions, 2971 flow [2024-06-14 13:28:07,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 249 transitions, 2928 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:07,597 INFO L231 Difference]: Finished difference. Result has 166 places, 206 transitions, 2258 flow [2024-06-14 13:28:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=166, PETRI_TRANSITIONS=206} [2024-06-14 13:28:07,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 13:28:07,598 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 206 transitions, 2258 flow [2024-06-14 13:28:07,598 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 13:28:07,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:07,598 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] [2024-06-14 13:28:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:28:07,598 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 13:28:07,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 351526165, now seen corresponding path program 2 times [2024-06-14 13:28:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031361816] [2024-06-14 13:28:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:10,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:10,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031361816] [2024-06-14 13:28:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031361816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:10,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097135855] [2024-06-14 13:28:10,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:10,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:10,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:11,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 206 transitions, 2258 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 13:28:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:12,600 INFO L124 PetriNetUnfolderBase]: 2619/4210 cut-off events. [2024-06-14 13:28:12,600 INFO L125 PetriNetUnfolderBase]: For 161644/161644 co-relation queries the response was YES. [2024-06-14 13:28:12,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25279 conditions, 4210 events. 2619/4210 cut-off events. For 161644/161644 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24536 event pairs, 763 based on Foata normal form. 24/4230 useless extension candidates. Maximal degree in co-relation 25198. Up to 3488 conditions per place. [2024-06-14 13:28:12,631 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 158 selfloop transitions, 76 changer transitions 0/239 dead transitions. [2024-06-14 13:28:12,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 2874 flow [2024-06-14 13:28:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:28:12,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:28:12,635 INFO L175 Difference]: Start difference. First operand has 166 places, 206 transitions, 2258 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:28:12,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 2874 flow [2024-06-14 13:28:12,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 239 transitions, 2763 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:12,809 INFO L231 Difference]: Finished difference. Result has 171 places, 208 transitions, 2349 flow [2024-06-14 13:28:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2349, PETRI_PLACES=171, PETRI_TRANSITIONS=208} [2024-06-14 13:28:12,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 13:28:12,810 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 208 transitions, 2349 flow [2024-06-14 13:28:12,810 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 13:28:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:12,810 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 13:28:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:28:12,810 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 13:28:12,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1198020487, now seen corresponding path program 3 times [2024-06-14 13:28:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382316587] [2024-06-14 13:28:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:16,190 INFO 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 13:28:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382316587] [2024-06-14 13:28:16,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382316587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:16,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:16,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622884206] [2024-06-14 13:28:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:16,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:16,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 208 transitions, 2349 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 13:28:16,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:16,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:16,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:17,673 INFO L124 PetriNetUnfolderBase]: 2770/4443 cut-off events. [2024-06-14 13:28:17,673 INFO L125 PetriNetUnfolderBase]: For 177205/177205 co-relation queries the response was YES. [2024-06-14 13:28:17,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27527 conditions, 4443 events. 2770/4443 cut-off events. For 177205/177205 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26146 event pairs, 764 based on Foata normal form. 16/4455 useless extension candidates. Maximal degree in co-relation 27444. Up to 3496 conditions per place. [2024-06-14 13:28:17,709 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 169 selfloop transitions, 72 changer transitions 0/246 dead transitions. [2024-06-14 13:28:17,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 246 transitions, 3115 flow [2024-06-14 13:28:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:28:17,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:28:17,716 INFO L175 Difference]: Start difference. First operand has 171 places, 208 transitions, 2349 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:28:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 246 transitions, 3115 flow [2024-06-14 13:28:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 246 transitions, 2941 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:17,886 INFO L231 Difference]: Finished difference. Result has 174 places, 212 transitions, 2424 flow [2024-06-14 13:28:17,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=174, PETRI_TRANSITIONS=212} [2024-06-14 13:28:17,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-14 13:28:17,886 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 212 transitions, 2424 flow [2024-06-14 13:28:17,887 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 13:28:17,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:17,887 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 13:28:17,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:28:17,887 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 13:28:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 603878275, now seen corresponding path program 4 times [2024-06-14 13:28:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264767260] [2024-06-14 13:28:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:21,614 INFO 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 13:28:21,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:21,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264767260] [2024-06-14 13:28:21,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264767260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:21,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146774903] [2024-06-14 13:28:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:21,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:21,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:21,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 212 transitions, 2424 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 13:28:21,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:21,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:23,244 INFO L124 PetriNetUnfolderBase]: 2998/4788 cut-off events. [2024-06-14 13:28:23,245 INFO L125 PetriNetUnfolderBase]: For 238514/238514 co-relation queries the response was YES. [2024-06-14 13:28:23,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29320 conditions, 4788 events. 2998/4788 cut-off events. For 238514/238514 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28199 event pairs, 828 based on Foata normal form. 68/4848 useless extension candidates. Maximal degree in co-relation 29235. Up to 3953 conditions per place. [2024-06-14 13:28:23,285 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 165 selfloop transitions, 70 changer transitions 6/246 dead transitions. [2024-06-14 13:28:23,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 246 transitions, 3066 flow [2024-06-14 13:28:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:28:23,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:28:23,286 INFO L175 Difference]: Start difference. First operand has 174 places, 212 transitions, 2424 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:28:23,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 246 transitions, 3066 flow [2024-06-14 13:28:23,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 246 transitions, 2943 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:23,505 INFO L231 Difference]: Finished difference. Result has 180 places, 210 transitions, 2466 flow [2024-06-14 13:28:23,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2466, PETRI_PLACES=180, PETRI_TRANSITIONS=210} [2024-06-14 13:28:23,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 13:28:23,505 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 210 transitions, 2466 flow [2024-06-14 13:28:23,506 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 13:28:23,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:23,506 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 13:28:23,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:28:23,506 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 13:28:23,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1610691301, now seen corresponding path program 1 times [2024-06-14 13:28:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:23,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061264931] [2024-06-14 13:28:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:26,926 INFO 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 13:28:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061264931] [2024-06-14 13:28:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061264931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:26,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:26,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:26,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570905462] [2024-06-14 13:28:26,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:26,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:26,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:26,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:26,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 210 transitions, 2466 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 13:28:26,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:26,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:28,788 INFO L124 PetriNetUnfolderBase]: 3338/5332 cut-off events. [2024-06-14 13:28:28,788 INFO L125 PetriNetUnfolderBase]: For 294710/294710 co-relation queries the response was YES. [2024-06-14 13:28:28,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34342 conditions, 5332 events. 3338/5332 cut-off events. For 294710/294710 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31738 event pairs, 888 based on Foata normal form. 56/5380 useless extension candidates. Maximal degree in co-relation 34255. Up to 3867 conditions per place. [2024-06-14 13:28:28,827 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 73 changer transitions 9/255 dead transitions. [2024-06-14 13:28:28,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 255 transitions, 3334 flow [2024-06-14 13:28:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 13:28:28,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 13:28:28,828 INFO L175 Difference]: Start difference. First operand has 180 places, 210 transitions, 2466 flow. Second operand 10 states and 178 transitions. [2024-06-14 13:28:28,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 255 transitions, 3334 flow [2024-06-14 13:28:29,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 255 transitions, 3164 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:29,042 INFO L231 Difference]: Finished difference. Result has 183 places, 211 transitions, 2543 flow [2024-06-14 13:28:29,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2543, PETRI_PLACES=183, PETRI_TRANSITIONS=211} [2024-06-14 13:28:29,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 13:28:29,043 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 211 transitions, 2543 flow [2024-06-14 13:28:29,043 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 13:28:29,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:29,043 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 13:28:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:28:29,043 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 13:28:29,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1403620849, now seen corresponding path program 5 times [2024-06-14 13:28:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:29,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255162667] [2024-06-14 13:28:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:32,489 INFO 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 13:28:32,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:32,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255162667] [2024-06-14 13:28:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255162667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:32,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117603833] [2024-06-14 13:28:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:32,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:32,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:32,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 211 transitions, 2543 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 13:28:32,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:32,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:32,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:34,119 INFO L124 PetriNetUnfolderBase]: 3016/4834 cut-off events. [2024-06-14 13:28:34,119 INFO L125 PetriNetUnfolderBase]: For 245296/245296 co-relation queries the response was YES. [2024-06-14 13:28:34,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29434 conditions, 4834 events. 3016/4834 cut-off events. For 245296/245296 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28633 event pairs, 848 based on Foata normal form. 68/4894 useless extension candidates. Maximal degree in co-relation 29345. Up to 4023 conditions per place. [2024-06-14 13:28:34,160 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 55 changer transitions 7/238 dead transitions. [2024-06-14 13:28:34,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 238 transitions, 3111 flow [2024-06-14 13:28:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:28:34,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:28:34,161 INFO L175 Difference]: Start difference. First operand has 183 places, 211 transitions, 2543 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:28:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 238 transitions, 3111 flow [2024-06-14 13:28:34,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 238 transitions, 2949 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:34,398 INFO L231 Difference]: Finished difference. Result has 185 places, 206 transitions, 2454 flow [2024-06-14 13:28:34,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2454, PETRI_PLACES=185, PETRI_TRANSITIONS=206} [2024-06-14 13:28:34,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 13:28:34,399 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 206 transitions, 2454 flow [2024-06-14 13:28:34,399 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 13:28:34,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:34,399 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 13:28:34,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:28:34,399 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 13:28:34,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1403617129, now seen corresponding path program 6 times [2024-06-14 13:28:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:34,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589568717] [2024-06-14 13:28:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:38,000 INFO 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 13:28:38,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:38,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589568717] [2024-06-14 13:28:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589568717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811977111] [2024-06-14 13:28:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 206 transitions, 2454 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 13:28:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:39,650 INFO L124 PetriNetUnfolderBase]: 3325/5345 cut-off events. [2024-06-14 13:28:39,651 INFO L125 PetriNetUnfolderBase]: For 290074/290074 co-relation queries the response was YES. [2024-06-14 13:28:39,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33268 conditions, 5345 events. 3325/5345 cut-off events. For 290074/290074 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32012 event pairs, 893 based on Foata normal form. 56/5393 useless extension candidates. Maximal degree in co-relation 33177. Up to 3674 conditions per place. [2024-06-14 13:28:39,691 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 54 changer transitions 0/242 dead transitions. [2024-06-14 13:28:39,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 3210 flow [2024-06-14 13:28:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:28:39,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:28:39,692 INFO L175 Difference]: Start difference. First operand has 185 places, 206 transitions, 2454 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:28:39,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 3210 flow [2024-06-14 13:28:39,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2919 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 13:28:39,942 INFO L231 Difference]: Finished difference. Result has 184 places, 208 transitions, 2343 flow [2024-06-14 13:28:39,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2343, PETRI_PLACES=184, PETRI_TRANSITIONS=208} [2024-06-14 13:28:39,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 13:28:39,943 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 208 transitions, 2343 flow [2024-06-14 13:28:39,943 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 13:28:39,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:39,943 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 13:28:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:28:39,943 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 13:28:39,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1375832083, now seen corresponding path program 1 times [2024-06-14 13:28:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462106888] [2024-06-14 13:28:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:42,856 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 13:28:42,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:42,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462106888] [2024-06-14 13:28:42,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462106888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:42,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:42,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429002735] [2024-06-14 13:28:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:42,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:42,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:42,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:42,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:42,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 208 transitions, 2343 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 13:28:42,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:42,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:42,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:44,639 INFO L124 PetriNetUnfolderBase]: 3340/5384 cut-off events. [2024-06-14 13:28:44,639 INFO L125 PetriNetUnfolderBase]: For 235981/235981 co-relation queries the response was YES. [2024-06-14 13:28:44,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33256 conditions, 5384 events. 3340/5384 cut-off events. For 235981/235981 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32325 event pairs, 1028 based on Foata normal form. 2/5385 useless extension candidates. Maximal degree in co-relation 33165. Up to 4970 conditions per place. [2024-06-14 13:28:44,683 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 209 selfloop transitions, 41 changer transitions 0/255 dead transitions. [2024-06-14 13:28:44,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3175 flow [2024-06-14 13:28:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:28:44,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:28:44,684 INFO L175 Difference]: Start difference. First operand has 184 places, 208 transitions, 2343 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:28:44,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3175 flow [2024-06-14 13:28:44,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 2994 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:44,951 INFO L231 Difference]: Finished difference. Result has 187 places, 213 transitions, 2361 flow [2024-06-14 13:28:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2361, PETRI_PLACES=187, PETRI_TRANSITIONS=213} [2024-06-14 13:28:44,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:28:44,952 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 213 transitions, 2361 flow [2024-06-14 13:28:44,952 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 13:28:44,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:44,952 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 13:28:44,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:28:44,952 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 13:28:44,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1055342741, now seen corresponding path program 2 times [2024-06-14 13:28:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026308491] [2024-06-14 13:28:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:48,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:48,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026308491] [2024-06-14 13:28:48,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026308491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:48,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:48,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995677535] [2024-06-14 13:28:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:48,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:48,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 213 transitions, 2361 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 13:28:48,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:48,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:48,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:49,834 INFO L124 PetriNetUnfolderBase]: 3351/5401 cut-off events. [2024-06-14 13:28:49,834 INFO L125 PetriNetUnfolderBase]: For 240386/240386 co-relation queries the response was YES. [2024-06-14 13:28:49,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32755 conditions, 5401 events. 3351/5401 cut-off events. For 240386/240386 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32582 event pairs, 1188 based on Foata normal form. 2/5402 useless extension candidates. Maximal degree in co-relation 32663. Up to 5117 conditions per place. [2024-06-14 13:28:49,878 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 207 selfloop transitions, 37 changer transitions 0/249 dead transitions. [2024-06-14 13:28:49,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3023 flow [2024-06-14 13:28:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:28:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:28:49,879 INFO L175 Difference]: Start difference. First operand has 187 places, 213 transitions, 2361 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:28:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3023 flow [2024-06-14 13:28:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 249 transitions, 2841 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:50,145 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2334 flow [2024-06-14 13:28:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-14 13:28:50,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 13:28:50,146 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2334 flow [2024-06-14 13:28:50,146 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 13:28:50,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:50,146 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 13:28:50,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:28:50,147 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 13:28:50,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1160811991, now seen corresponding path program 1 times [2024-06-14 13:28:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980073019] [2024-06-14 13:28:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:53,490 INFO 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 13:28:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:53,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980073019] [2024-06-14 13:28:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980073019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:53,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33153371] [2024-06-14 13:28:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:53,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:53,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:53,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2334 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 13:28:53,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:55,198 INFO L124 PetriNetUnfolderBase]: 3361/5421 cut-off events. [2024-06-14 13:28:55,198 INFO L125 PetriNetUnfolderBase]: For 248472/248472 co-relation queries the response was YES. [2024-06-14 13:28:55,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32836 conditions, 5421 events. 3361/5421 cut-off events. For 248472/248472 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32761 event pairs, 1163 based on Foata normal form. 2/5422 useless extension candidates. Maximal degree in co-relation 32745. Up to 5051 conditions per place. [2024-06-14 13:28:55,249 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 47 changer transitions 0/258 dead transitions. [2024-06-14 13:28:55,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 258 transitions, 3012 flow [2024-06-14 13:28:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:28:55,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:28:55,251 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2334 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:28:55,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 258 transitions, 3012 flow [2024-06-14 13:28:55,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 258 transitions, 2927 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:55,539 INFO L231 Difference]: Finished difference. Result has 192 places, 220 transitions, 2406 flow [2024-06-14 13:28:55,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2406, PETRI_PLACES=192, PETRI_TRANSITIONS=220} [2024-06-14 13:28:55,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 13:28:55,540 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 220 transitions, 2406 flow [2024-06-14 13:28:55,540 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 13:28:55,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:55,540 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, 1] [2024-06-14 13:28:55,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:28:55,540 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 13:28:55,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:55,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1617203349, now seen corresponding path program 3 times [2024-06-14 13:28:55,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:55,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165288577] [2024-06-14 13:28:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:58,994 INFO 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 13:28:58,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165288577] [2024-06-14 13:28:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165288577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:58,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:58,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115556525] [2024-06-14 13:28:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:59,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:28:59,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 220 transitions, 2406 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 13:28:59,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:59,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:28:59,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:00,757 INFO L124 PetriNetUnfolderBase]: 3356/5406 cut-off events. [2024-06-14 13:29:00,758 INFO L125 PetriNetUnfolderBase]: For 255849/255849 co-relation queries the response was YES. [2024-06-14 13:29:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33398 conditions, 5406 events. 3356/5406 cut-off events. For 255849/255849 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32545 event pairs, 1131 based on Foata normal form. 2/5407 useless extension candidates. Maximal degree in co-relation 33306. Up to 5124 conditions per place. [2024-06-14 13:29:00,799 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 204 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-14 13:29:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 245 transitions, 2974 flow [2024-06-14 13:29:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:29:00,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:29:00,801 INFO L175 Difference]: Start difference. First operand has 192 places, 220 transitions, 2406 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:29:00,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 245 transitions, 2974 flow [2024-06-14 13:29:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 245 transitions, 2841 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:01,064 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2375 flow [2024-06-14 13:29:01,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2375, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-14 13:29:01,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 13:29:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2375 flow [2024-06-14 13:29:01,064 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 13:29:01,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:29:01,065 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 13:29:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1331514421, now seen corresponding path program 2 times [2024-06-14 13:29:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737192166] [2024-06-14 13:29:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:03,839 INFO 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 13:29:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737192166] [2024-06-14 13:29:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737192166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:03,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:03,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597188256] [2024-06-14 13:29:03,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:03,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:03,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:03,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:03,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2375 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 13:29:03,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:03,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:03,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:05,759 INFO L124 PetriNetUnfolderBase]: 3446/5564 cut-off events. [2024-06-14 13:29:05,759 INFO L125 PetriNetUnfolderBase]: For 279512/279515 co-relation queries the response was YES. [2024-06-14 13:29:05,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34732 conditions, 5564 events. 3446/5564 cut-off events. For 279512/279515 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 33779 event pairs, 919 based on Foata normal form. 4/5565 useless extension candidates. Maximal degree in co-relation 34638. Up to 4496 conditions per place. [2024-06-14 13:29:05,814 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 162 selfloop transitions, 109 changer transitions 0/276 dead transitions. [2024-06-14 13:29:05,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 276 transitions, 3579 flow [2024-06-14 13:29:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:29:05,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-14 13:29:05,815 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2375 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:29:05,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 276 transitions, 3579 flow [2024-06-14 13:29:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 276 transitions, 3496 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:06,285 INFO L231 Difference]: Finished difference. Result has 199 places, 235 transitions, 2748 flow [2024-06-14 13:29:06,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2748, PETRI_PLACES=199, PETRI_TRANSITIONS=235} [2024-06-14 13:29:06,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-14 13:29:06,286 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 235 transitions, 2748 flow [2024-06-14 13:29:06,286 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 13:29:06,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:06,286 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, 1] [2024-06-14 13:29:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:29:06,286 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 13:29:06,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1341037621, now seen corresponding path program 3 times [2024-06-14 13:29:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:06,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97393207] [2024-06-14 13:29:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:09,155 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 13:29:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97393207] [2024-06-14 13:29:09,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97393207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:09,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:09,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330488518] [2024-06-14 13:29:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:09,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:09,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:09,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 235 transitions, 2748 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 13:29:09,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:09,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:09,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:11,112 INFO L124 PetriNetUnfolderBase]: 3456/5582 cut-off events. [2024-06-14 13:29:11,112 INFO L125 PetriNetUnfolderBase]: For 294118/294121 co-relation queries the response was YES. [2024-06-14 13:29:11,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36129 conditions, 5582 events. 3456/5582 cut-off events. For 294118/294121 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33964 event pairs, 924 based on Foata normal form. 4/5583 useless extension candidates. Maximal degree in co-relation 36034. Up to 4502 conditions per place. [2024-06-14 13:29:11,166 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 110 changer transitions 0/274 dead transitions. [2024-06-14 13:29:11,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 274 transitions, 3774 flow [2024-06-14 13:29:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:29:11,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:29:11,168 INFO L175 Difference]: Start difference. First operand has 199 places, 235 transitions, 2748 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:29:11,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 274 transitions, 3774 flow [2024-06-14 13:29:11,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 274 transitions, 3591 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-14 13:29:11,491 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2855 flow [2024-06-14 13:29:11,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2855, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-14 13:29:11,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 13:29:11,491 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2855 flow [2024-06-14 13:29:11,491 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 13:29:11,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:11,491 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 13:29:11,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:29:11,492 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 13:29:11,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1621967925, now seen corresponding path program 4 times [2024-06-14 13:29:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383600216] [2024-06-14 13:29:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:14,360 INFO 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 13:29:14,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:14,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383600216] [2024-06-14 13:29:14,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383600216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:14,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:14,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36128726] [2024-06-14 13:29:14,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:14,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:14,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2855 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 13:29:14,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:14,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:14,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:16,148 INFO L124 PetriNetUnfolderBase]: 3466/5582 cut-off events. [2024-06-14 13:29:16,148 INFO L125 PetriNetUnfolderBase]: For 301079/301079 co-relation queries the response was YES. [2024-06-14 13:29:16,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35963 conditions, 5582 events. 3466/5582 cut-off events. For 301079/301079 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 33905 event pairs, 1152 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 35865. Up to 5250 conditions per place. [2024-06-14 13:29:16,200 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 43 changer transitions 0/266 dead transitions. [2024-06-14 13:29:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 266 transitions, 3495 flow [2024-06-14 13:29:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:29:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:29:16,202 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2855 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:29:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 266 transitions, 3495 flow [2024-06-14 13:29:16,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 266 transitions, 3296 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:16,582 INFO L231 Difference]: Finished difference. Result has 208 places, 241 transitions, 2795 flow [2024-06-14 13:29:16,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2795, PETRI_PLACES=208, PETRI_TRANSITIONS=241} [2024-06-14 13:29:16,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-14 13:29:16,583 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 241 transitions, 2795 flow [2024-06-14 13:29:16,583 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 13:29:16,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:16,583 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 13:29:16,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:29:16,583 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 13:29:16,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1008838481, now seen corresponding path program 1 times [2024-06-14 13:29:16,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:16,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038198748] [2024-06-14 13:29:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:19,574 INFO 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 13:29:19,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:19,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038198748] [2024-06-14 13:29:19,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038198748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:19,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:19,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997179415] [2024-06-14 13:29:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:19,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:19,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:19,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 241 transitions, 2795 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 13:29:19,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:19,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:19,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:21,442 INFO L124 PetriNetUnfolderBase]: 3572/5764 cut-off events. [2024-06-14 13:29:21,442 INFO L125 PetriNetUnfolderBase]: For 337020/337023 co-relation queries the response was YES. [2024-06-14 13:29:21,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37653 conditions, 5764 events. 3572/5764 cut-off events. For 337020/337023 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35309 event pairs, 1105 based on Foata normal form. 4/5765 useless extension candidates. Maximal degree in co-relation 37554. Up to 4955 conditions per place. [2024-06-14 13:29:21,495 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 196 selfloop transitions, 89 changer transitions 0/290 dead transitions. [2024-06-14 13:29:21,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 3720 flow [2024-06-14 13:29:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:29:21,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 13:29:21,497 INFO L175 Difference]: Start difference. First operand has 208 places, 241 transitions, 2795 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:29:21,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 3720 flow [2024-06-14 13:29:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 290 transitions, 3617 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:21,867 INFO L231 Difference]: Finished difference. Result has 211 places, 247 transitions, 2996 flow [2024-06-14 13:29:21,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2996, PETRI_PLACES=211, PETRI_TRANSITIONS=247} [2024-06-14 13:29:21,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-14 13:29:21,868 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 247 transitions, 2996 flow [2024-06-14 13:29:21,868 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 13:29:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:21,868 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 13:29:21,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:29:21,868 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 13:29:21,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1006096841, now seen corresponding path program 2 times [2024-06-14 13:29:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340827733] [2024-06-14 13:29:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340827733] [2024-06-14 13:29:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340827733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078590213] [2024-06-14 13:29:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:25,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:25,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 247 transitions, 2996 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 13:29:25,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:25,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:25,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:26,865 INFO L124 PetriNetUnfolderBase]: 3567/5763 cut-off events. [2024-06-14 13:29:26,865 INFO L125 PetriNetUnfolderBase]: For 347034/347037 co-relation queries the response was YES. [2024-06-14 13:29:26,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38271 conditions, 5763 events. 3567/5763 cut-off events. For 347034/347037 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 35329 event pairs, 1110 based on Foata normal form. 4/5764 useless extension candidates. Maximal degree in co-relation 38170. Up to 5084 conditions per place. [2024-06-14 13:29:26,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 190 selfloop transitions, 85 changer transitions 0/280 dead transitions. [2024-06-14 13:29:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 3648 flow [2024-06-14 13:29:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:29:26,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:29:26,919 INFO L175 Difference]: Start difference. First operand has 211 places, 247 transitions, 2996 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:29:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 3648 flow [2024-06-14 13:29:27,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 280 transitions, 3469 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:27,292 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 2994 flow [2024-06-14 13:29:27,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2024-06-14 13:29:27,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 13:29:27,292 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 2994 flow [2024-06-14 13:29:27,293 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 13:29:27,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:27,293 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 13:29:27,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:29:27,293 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 13:29:27,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1621974869, now seen corresponding path program 3 times [2024-06-14 13:29:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:27,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129140197] [2024-06-14 13:29:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:30,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129140197] [2024-06-14 13:29:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129140197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188071300] [2024-06-14 13:29:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:30,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:30,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 2994 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 13:29:30,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:30,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:30,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:32,420 INFO L124 PetriNetUnfolderBase]: 3611/5799 cut-off events. [2024-06-14 13:29:32,420 INFO L125 PetriNetUnfolderBase]: For 374895/374895 co-relation queries the response was YES. [2024-06-14 13:29:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38744 conditions, 5799 events. 3611/5799 cut-off events. For 374895/374895 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35401 event pairs, 1163 based on Foata normal form. 12/5810 useless extension candidates. Maximal degree in co-relation 38642. Up to 5431 conditions per place. [2024-06-14 13:29:32,474 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 227 selfloop transitions, 38 changer transitions 9/279 dead transitions. [2024-06-14 13:29:32,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3708 flow [2024-06-14 13:29:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:29:32,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:29:32,476 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 2994 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:29:32,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3708 flow [2024-06-14 13:29:32,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3525 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:32,784 INFO L231 Difference]: Finished difference. Result has 216 places, 245 transitions, 2882 flow [2024-06-14 13:29:32,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=216, PETRI_TRANSITIONS=245} [2024-06-14 13:29:32,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 13:29:32,785 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 245 transitions, 2882 flow [2024-06-14 13:29:32,785 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 13:29:32,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:32,785 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 13:29:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:29:32,785 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 13:29:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1238957003, now seen corresponding path program 5 times [2024-06-14 13:29:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291505450] [2024-06-14 13:29:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:36,142 INFO 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 13:29:36,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291505450] [2024-06-14 13:29:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291505450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052117770] [2024-06-14 13:29:36,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:36,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:36,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:36,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 245 transitions, 2882 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 13:29:36,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:36,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:36,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:38,144 INFO L124 PetriNetUnfolderBase]: 3575/5749 cut-off events. [2024-06-14 13:29:38,145 INFO L125 PetriNetUnfolderBase]: For 369284/369284 co-relation queries the response was YES. [2024-06-14 13:29:38,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38411 conditions, 5749 events. 3575/5749 cut-off events. For 369284/369284 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34980 event pairs, 943 based on Foata normal form. 2/5743 useless extension candidates. Maximal degree in co-relation 38308. Up to 4671 conditions per place. [2024-06-14 13:29:38,201 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 182 selfloop transitions, 97 changer transitions 0/284 dead transitions. [2024-06-14 13:29:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3834 flow [2024-06-14 13:29:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:29:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:29:38,202 INFO L175 Difference]: Start difference. First operand has 216 places, 245 transitions, 2882 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:29:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3834 flow [2024-06-14 13:29:38,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 3742 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:38,636 INFO L231 Difference]: Finished difference. Result has 218 places, 248 transitions, 3040 flow [2024-06-14 13:29:38,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3040, PETRI_PLACES=218, PETRI_TRANSITIONS=248} [2024-06-14 13:29:38,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 13:29:38,637 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 248 transitions, 3040 flow [2024-06-14 13:29:38,637 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 13:29:38,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:38,637 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 13:29:38,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:29:38,637 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 13:29:38,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1647620299, now seen corresponding path program 6 times [2024-06-14 13:29:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:38,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974408157] [2024-06-14 13:29:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:38,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:41,590 INFO 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 13:29:41,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:41,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974408157] [2024-06-14 13:29:41,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974408157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:41,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:41,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429621537] [2024-06-14 13:29:41,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:41,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:41,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:41,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:41,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 248 transitions, 3040 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 13:29:41,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:41,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:41,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:43,573 INFO L124 PetriNetUnfolderBase]: 3585/5767 cut-off events. [2024-06-14 13:29:43,573 INFO L125 PetriNetUnfolderBase]: For 382636/382636 co-relation queries the response was YES. [2024-06-14 13:29:43,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39110 conditions, 5767 events. 3585/5767 cut-off events. For 382636/382636 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 35094 event pairs, 941 based on Foata normal form. 2/5761 useless extension candidates. Maximal degree in co-relation 39006. Up to 4677 conditions per place. [2024-06-14 13:29:43,635 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 181 selfloop transitions, 97 changer transitions 0/283 dead transitions. [2024-06-14 13:29:43,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 283 transitions, 3990 flow [2024-06-14 13:29:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:29:43,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:29:43,636 INFO L175 Difference]: Start difference. First operand has 218 places, 248 transitions, 3040 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:29:43,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 283 transitions, 3990 flow [2024-06-14 13:29:44,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 283 transitions, 3690 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:44,256 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2997 flow [2024-06-14 13:29:44,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2997, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2024-06-14 13:29:44,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:29:44,256 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2997 flow [2024-06-14 13:29:44,257 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 13:29:44,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:44,257 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 13:29:44,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:29:44,257 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 13:29:44,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash 881608497, now seen corresponding path program 7 times [2024-06-14 13:29:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:44,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590453702] [2024-06-14 13:29:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:47,472 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 13:29:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590453702] [2024-06-14 13:29:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590453702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:47,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298530637] [2024-06-14 13:29:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:47,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:47,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:47,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2997 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 13:29:47,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:47,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:47,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:49,473 INFO L124 PetriNetUnfolderBase]: 3647/5853 cut-off events. [2024-06-14 13:29:49,473 INFO L125 PetriNetUnfolderBase]: For 409638/409638 co-relation queries the response was YES. [2024-06-14 13:29:49,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39674 conditions, 5853 events. 3647/5853 cut-off events. For 409638/409638 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35702 event pairs, 960 based on Foata normal form. 6/5851 useless extension candidates. Maximal degree in co-relation 39571. Up to 4723 conditions per place. [2024-06-14 13:29:49,534 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 99 changer transitions 0/287 dead transitions. [2024-06-14 13:29:49,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 287 transitions, 3983 flow [2024-06-14 13:29:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:29:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:29:49,535 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2997 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:29:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 287 transitions, 3983 flow [2024-06-14 13:29:50,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 287 transitions, 3784 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:50,035 INFO L231 Difference]: Finished difference. Result has 222 places, 258 transitions, 3103 flow [2024-06-14 13:29:50,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3103, PETRI_PLACES=222, PETRI_TRANSITIONS=258} [2024-06-14 13:29:50,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 13:29:50,035 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 258 transitions, 3103 flow [2024-06-14 13:29:50,036 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 13:29:50,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:50,036 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 13:29:50,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:29:50,036 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 13:29:50,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -356204521, now seen corresponding path program 8 times [2024-06-14 13:29:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:50,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546923571] [2024-06-14 13:29:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:53,083 INFO 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 13:29:53,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:53,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546923571] [2024-06-14 13:29:53,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546923571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:53,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:53,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346256127] [2024-06-14 13:29:53,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:53,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:53,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 258 transitions, 3103 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 13:29:53,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:53,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:53,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:54,892 INFO L124 PetriNetUnfolderBase]: 3629/5833 cut-off events. [2024-06-14 13:29:54,893 INFO L125 PetriNetUnfolderBase]: For 412126/412126 co-relation queries the response was YES. [2024-06-14 13:29:54,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 5833 events. 3629/5833 cut-off events. For 412126/412126 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35667 event pairs, 1136 based on Foata normal form. 6/5831 useless extension candidates. Maximal degree in co-relation 39317. Up to 5218 conditions per place. [2024-06-14 13:29:54,946 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 56 changer transitions 0/280 dead transitions. [2024-06-14 13:29:54,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 280 transitions, 3837 flow [2024-06-14 13:29:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:29:54,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:29:54,947 INFO L175 Difference]: Start difference. First operand has 222 places, 258 transitions, 3103 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:29:54,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 280 transitions, 3837 flow [2024-06-14 13:29:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 280 transitions, 3683 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:29:55,371 INFO L231 Difference]: Finished difference. Result has 226 places, 258 transitions, 3068 flow [2024-06-14 13:29:55,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3068, PETRI_PLACES=226, PETRI_TRANSITIONS=258} [2024-06-14 13:29:55,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:29:55,371 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 258 transitions, 3068 flow [2024-06-14 13:29:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:55,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:55,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:29:55,372 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 13:29:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1557421003, now seen corresponding path program 9 times [2024-06-14 13:29:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035138036] [2024-06-14 13:29:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:55,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:58,245 INFO 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 13:29:58,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:58,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035138036] [2024-06-14 13:29:58,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035138036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:58,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:58,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980080027] [2024-06-14 13:29:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:58,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:58,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:29:58,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 258 transitions, 3068 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 13:29:58,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:58,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:29:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:59,961 INFO L124 PetriNetUnfolderBase]: 3611/5813 cut-off events. [2024-06-14 13:29:59,962 INFO L125 PetriNetUnfolderBase]: For 413095/413095 co-relation queries the response was YES. [2024-06-14 13:30:00,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38831 conditions, 5813 events. 3611/5813 cut-off events. For 413095/413095 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35588 event pairs, 1127 based on Foata normal form. 6/5811 useless extension candidates. Maximal degree in co-relation 38726. Up to 5207 conditions per place. [2024-06-14 13:30:00,021 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 61 changer transitions 0/285 dead transitions. [2024-06-14 13:30:00,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 285 transitions, 3824 flow [2024-06-14 13:30:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:30:00,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:30:00,022 INFO L175 Difference]: Start difference. First operand has 226 places, 258 transitions, 3068 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:30:00,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 285 transitions, 3824 flow [2024-06-14 13:30:00,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 285 transitions, 3610 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:00,625 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 2983 flow [2024-06-14 13:30:00,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2983, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2024-06-14 13:30:00,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:30:00,626 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 2983 flow [2024-06-14 13:30:00,626 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 13:30:00,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:00,626 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 13:30:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:30:00,626 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 13:30:00,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1232283819, now seen corresponding path program 4 times [2024-06-14 13:30:00,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:00,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126295953] [2024-06-14 13:30:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:00,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:03,487 INFO 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 13:30:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126295953] [2024-06-14 13:30:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126295953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616999191] [2024-06-14 13:30:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:03,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:03,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 2983 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 13:30:03,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:03,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:03,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:05,400 INFO L124 PetriNetUnfolderBase]: 3789/6162 cut-off events. [2024-06-14 13:30:05,400 INFO L125 PetriNetUnfolderBase]: For 473533/473533 co-relation queries the response was YES. [2024-06-14 13:30:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42323 conditions, 6162 events. 3789/6162 cut-off events. For 473533/473533 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38485 event pairs, 1150 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 42217. Up to 5208 conditions per place. [2024-06-14 13:30:05,464 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 80 changer transitions 0/303 dead transitions. [2024-06-14 13:30:05,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 303 transitions, 3952 flow [2024-06-14 13:30:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:30:05,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:30:05,465 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 2983 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:30:05,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 303 transitions, 3952 flow [2024-06-14 13:30:06,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 303 transitions, 3760 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:30:06,143 INFO L231 Difference]: Finished difference. Result has 227 places, 264 transitions, 3089 flow [2024-06-14 13:30:06,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3089, PETRI_PLACES=227, PETRI_TRANSITIONS=264} [2024-06-14 13:30:06,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 13:30:06,144 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 264 transitions, 3089 flow [2024-06-14 13:30:06,144 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 13:30:06,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:06,144 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 13:30:06,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:30:06,145 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 13:30:06,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1010578329, now seen corresponding path program 5 times [2024-06-14 13:30:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:06,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621026332] [2024-06-14 13:30:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:06,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:09,270 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 13:30:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621026332] [2024-06-14 13:30:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621026332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:09,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106881859] [2024-06-14 13:30:09,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:09,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:09,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:09,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:09,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:09,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 264 transitions, 3089 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 13:30:09,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:09,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:09,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:11,236 INFO L124 PetriNetUnfolderBase]: 3797/6180 cut-off events. [2024-06-14 13:30:11,237 INFO L125 PetriNetUnfolderBase]: For 488207/488207 co-relation queries the response was YES. [2024-06-14 13:30:11,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43027 conditions, 6180 events. 3797/6180 cut-off events. For 488207/488207 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38703 event pairs, 1157 based on Foata normal form. 2/6178 useless extension candidates. Maximal degree in co-relation 42919. Up to 5428 conditions per place. [2024-06-14 13:30:11,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 75 changer transitions 0/295 dead transitions. [2024-06-14 13:30:11,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 295 transitions, 3801 flow [2024-06-14 13:30:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:30:11,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:30:11,302 INFO L175 Difference]: Start difference. First operand has 227 places, 264 transitions, 3089 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:30:11,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 295 transitions, 3801 flow [2024-06-14 13:30:11,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 295 transitions, 3618 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:11,937 INFO L231 Difference]: Finished difference. Result has 230 places, 266 transitions, 3108 flow [2024-06-14 13:30:11,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3108, PETRI_PLACES=230, PETRI_TRANSITIONS=266} [2024-06-14 13:30:11,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 13:30:11,937 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 266 transitions, 3108 flow [2024-06-14 13:30:11,938 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 13:30:11,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:11,938 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 13:30:11,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:30:11,938 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 13:30:11,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1866780079, now seen corresponding path program 6 times [2024-06-14 13:30:11,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:11,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341011711] [2024-06-14 13:30:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:14,856 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 13:30:14,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341011711] [2024-06-14 13:30:14,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341011711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:14,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:14,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547318910] [2024-06-14 13:30:14,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:14,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:14,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 266 transitions, 3108 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 13:30:14,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:14,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:14,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:16,752 INFO L124 PetriNetUnfolderBase]: 3805/6206 cut-off events. [2024-06-14 13:30:16,752 INFO L125 PetriNetUnfolderBase]: For 502773/502773 co-relation queries the response was YES. [2024-06-14 13:30:16,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43130 conditions, 6206 events. 3805/6206 cut-off events. For 502773/502773 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38818 event pairs, 1034 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 43021. Up to 4078 conditions per place. [2024-06-14 13:30:16,807 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 210 selfloop transitions, 98 changer transitions 0/313 dead transitions. [2024-06-14 13:30:16,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 313 transitions, 4211 flow [2024-06-14 13:30:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:30:16,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:30:16,809 INFO L175 Difference]: Start difference. First operand has 230 places, 266 transitions, 3108 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:30:16,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 313 transitions, 4211 flow [2024-06-14 13:30:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 313 transitions, 4047 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:17,413 INFO L231 Difference]: Finished difference. Result has 233 places, 269 transitions, 3218 flow [2024-06-14 13:30:17,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3218, PETRI_PLACES=233, PETRI_TRANSITIONS=269} [2024-06-14 13:30:17,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 13:30:17,413 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 269 transitions, 3218 flow [2024-06-14 13:30:17,414 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 13:30:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:17,414 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 13:30:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:30:17,414 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 13:30:17,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1855352239, now seen corresponding path program 7 times [2024-06-14 13:30:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:17,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629698288] [2024-06-14 13:30:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:17,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:20,561 INFO 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 13:30:20,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:20,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629698288] [2024-06-14 13:30:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629698288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:20,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:20,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969747936] [2024-06-14 13:30:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:20,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:20,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:20,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 269 transitions, 3218 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 13:30:20,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:20,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:20,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:22,636 INFO L124 PetriNetUnfolderBase]: 3772/6129 cut-off events. [2024-06-14 13:30:22,636 INFO L125 PetriNetUnfolderBase]: For 517684/517684 co-relation queries the response was YES. [2024-06-14 13:30:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43094 conditions, 6129 events. 3772/6129 cut-off events. For 517684/517684 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38103 event pairs, 1080 based on Foata normal form. 10/6135 useless extension candidates. Maximal degree in co-relation 42983. Up to 4060 conditions per place. [2024-06-14 13:30:22,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 90 changer transitions 0/309 dead transitions. [2024-06-14 13:30:22,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 309 transitions, 4106 flow [2024-06-14 13:30:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:30:22,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:30:22,705 INFO L175 Difference]: Start difference. First operand has 233 places, 269 transitions, 3218 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:30:22,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 309 transitions, 4106 flow [2024-06-14 13:30:23,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 309 transitions, 3932 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:23,440 INFO L231 Difference]: Finished difference. Result has 237 places, 269 transitions, 3230 flow [2024-06-14 13:30:23,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3230, PETRI_PLACES=237, PETRI_TRANSITIONS=269} [2024-06-14 13:30:23,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 13:30:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 269 transitions, 3230 flow [2024-06-14 13:30:23,440 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 13:30:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:23,441 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 13:30:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:30:23,441 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 13:30:23,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash 394109757, now seen corresponding path program 8 times [2024-06-14 13:30:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959915156] [2024-06-14 13:30:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:26,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959915156] [2024-06-14 13:30:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959915156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:26,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:26,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048224352] [2024-06-14 13:30:26,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:26,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:26,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:26,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 269 transitions, 3230 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 13:30:26,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:26,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:26,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:28,706 INFO L124 PetriNetUnfolderBase]: 3739/6088 cut-off events. [2024-06-14 13:30:28,706 INFO L125 PetriNetUnfolderBase]: For 507112/507112 co-relation queries the response was YES. [2024-06-14 13:30:28,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41919 conditions, 6088 events. 3739/6088 cut-off events. For 507112/507112 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38111 event pairs, 1135 based on Foata normal form. 14/6098 useless extension candidates. Maximal degree in co-relation 41807. Up to 5292 conditions per place. [2024-06-14 13:30:28,766 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 224 selfloop transitions, 71 changer transitions 0/300 dead transitions. [2024-06-14 13:30:28,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 300 transitions, 3930 flow [2024-06-14 13:30:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:30:28,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:30:28,768 INFO L175 Difference]: Start difference. First operand has 237 places, 269 transitions, 3230 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:30:28,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 300 transitions, 3930 flow [2024-06-14 13:30:29,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3732 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:29,259 INFO L231 Difference]: Finished difference. Result has 238 places, 269 transitions, 3180 flow [2024-06-14 13:30:29,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3180, PETRI_PLACES=238, PETRI_TRANSITIONS=269} [2024-06-14 13:30:29,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 13:30:29,260 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 269 transitions, 3180 flow [2024-06-14 13:30:29,260 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 13:30:29,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:29,260 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 13:30:29,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:30:29,260 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 13:30:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1988006267, now seen corresponding path program 9 times [2024-06-14 13:30:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:29,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649062756] [2024-06-14 13:30:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:29,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:32,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649062756] [2024-06-14 13:30:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649062756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125788131] [2024-06-14 13:30:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:32,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:32,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 269 transitions, 3180 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 13:30:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:34,653 INFO L124 PetriNetUnfolderBase]: 3696/6019 cut-off events. [2024-06-14 13:30:34,653 INFO L125 PetriNetUnfolderBase]: For 485781/485781 co-relation queries the response was YES. [2024-06-14 13:30:34,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40430 conditions, 6019 events. 3696/6019 cut-off events. For 485781/485781 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37603 event pairs, 1102 based on Foata normal form. 14/6029 useless extension candidates. Maximal degree in co-relation 40317. Up to 4931 conditions per place. [2024-06-14 13:30:34,711 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 223 selfloop transitions, 76 changer transitions 0/304 dead transitions. [2024-06-14 13:30:34,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 304 transitions, 3918 flow [2024-06-14 13:30:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:30:34,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:30:34,712 INFO L175 Difference]: Start difference. First operand has 238 places, 269 transitions, 3180 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:30:34,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 304 transitions, 3918 flow [2024-06-14 13:30:35,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 304 transitions, 3754 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:35,116 INFO L231 Difference]: Finished difference. Result has 240 places, 269 transitions, 3175 flow [2024-06-14 13:30:35,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3175, PETRI_PLACES=240, PETRI_TRANSITIONS=269} [2024-06-14 13:30:35,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 13:30:35,119 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 269 transitions, 3175 flow [2024-06-14 13:30:35,119 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 13:30:35,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:35,119 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 13:30:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:30:35,119 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 13:30:35,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1098511863, now seen corresponding path program 10 times [2024-06-14 13:30:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:35,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342334252] [2024-06-14 13:30:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:35,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:38,723 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 13:30:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:38,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342334252] [2024-06-14 13:30:38,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342334252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:38,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:38,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:30:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571316511] [2024-06-14 13:30:38,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:30:38,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:30:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:30:38,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:38,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 269 transitions, 3175 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 13:30:38,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:38,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:38,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:40,654 INFO L124 PetriNetUnfolderBase]: 3663/5931 cut-off events. [2024-06-14 13:30:40,655 INFO L125 PetriNetUnfolderBase]: For 466587/466587 co-relation queries the response was YES. [2024-06-14 13:30:40,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39238 conditions, 5931 events. 3663/5931 cut-off events. For 466587/466587 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36728 event pairs, 1145 based on Foata normal form. 14/5937 useless extension candidates. Maximal degree in co-relation 39124. Up to 5345 conditions per place. [2024-06-14 13:30:40,708 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 51 changer transitions 0/294 dead transitions. [2024-06-14 13:30:40,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 294 transitions, 3843 flow [2024-06-14 13:30:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:30:40,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:30:40,709 INFO L175 Difference]: Start difference. First operand has 240 places, 269 transitions, 3175 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:30:40,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 294 transitions, 3843 flow [2024-06-14 13:30:41,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 294 transitions, 3659 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:41,179 INFO L231 Difference]: Finished difference. Result has 241 places, 269 transitions, 3099 flow [2024-06-14 13:30:41,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3099, PETRI_PLACES=241, PETRI_TRANSITIONS=269} [2024-06-14 13:30:41,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 13:30:41,180 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 269 transitions, 3099 flow [2024-06-14 13:30:41,180 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 13:30:41,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:41,180 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 13:30:41,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:30:41,180 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 13:30:41,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1557414059, now seen corresponding path program 11 times [2024-06-14 13:30:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:41,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128582221] [2024-06-14 13:30:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:41,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:44,739 INFO 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 13:30:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128582221] [2024-06-14 13:30:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128582221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:30:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781389264] [2024-06-14 13:30:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:30:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:30:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:30:44,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:44,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 269 transitions, 3099 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 13:30:44,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:44,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:44,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:46,505 INFO L124 PetriNetUnfolderBase]: 3473/5635 cut-off events. [2024-06-14 13:30:46,506 INFO L125 PetriNetUnfolderBase]: For 441139/441139 co-relation queries the response was YES. [2024-06-14 13:30:46,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33051 conditions, 5635 events. 3473/5635 cut-off events. For 441139/441139 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34957 event pairs, 983 based on Foata normal form. 68/5695 useless extension candidates. Maximal degree in co-relation 32936. Up to 4761 conditions per place. [2024-06-14 13:30:46,565 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 51 changer transitions 7/301 dead transitions. [2024-06-14 13:30:46,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 301 transitions, 3807 flow [2024-06-14 13:30:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:30:46,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:30:46,566 INFO L175 Difference]: Start difference. First operand has 241 places, 269 transitions, 3099 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:30:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 301 transitions, 3807 flow [2024-06-14 13:30:46,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 301 transitions, 3679 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:46,967 INFO L231 Difference]: Finished difference. Result has 244 places, 264 transitions, 3012 flow [2024-06-14 13:30:46,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3012, PETRI_PLACES=244, PETRI_TRANSITIONS=264} [2024-06-14 13:30:46,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 13:30:46,968 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 264 transitions, 3012 flow [2024-06-14 13:30:46,968 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 13:30:46,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:46,968 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 13:30:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:30:46,968 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 13:30:46,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1982676053, now seen corresponding path program 12 times [2024-06-14 13:30:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675792799] [2024-06-14 13:30:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:50,811 INFO 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 13:30:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675792799] [2024-06-14 13:30:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675792799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:30:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778908696] [2024-06-14 13:30:50,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:30:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:30:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:30:50,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:50,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 264 transitions, 3012 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 13:30:50,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:50,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:50,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:52,371 INFO L124 PetriNetUnfolderBase]: 3098/5036 cut-off events. [2024-06-14 13:30:52,371 INFO L125 PetriNetUnfolderBase]: For 276817/276817 co-relation queries the response was YES. [2024-06-14 13:30:52,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 5036 events. 3098/5036 cut-off events. For 276817/276817 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30904 event pairs, 806 based on Foata normal form. 14/5042 useless extension candidates. Maximal degree in co-relation 29418. Up to 4000 conditions per place. [2024-06-14 13:30:52,423 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 235 selfloop transitions, 53 changer transitions 0/293 dead transitions. [2024-06-14 13:30:52,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 293 transitions, 3708 flow [2024-06-14 13:30:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:30:52,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:30:52,425 INFO L175 Difference]: Start difference. First operand has 244 places, 264 transitions, 3012 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:30:52,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 293 transitions, 3708 flow [2024-06-14 13:30:52,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 293 transitions, 3377 flow, removed 14 selfloop flow, removed 16 redundant places. [2024-06-14 13:30:52,857 INFO L231 Difference]: Finished difference. Result has 236 places, 264 transitions, 2795 flow [2024-06-14 13:30:52,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2795, PETRI_PLACES=236, PETRI_TRANSITIONS=264} [2024-06-14 13:30:52,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 13:30:52,857 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 264 transitions, 2795 flow [2024-06-14 13:30:52,858 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 13:30:52,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:52,858 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 13:30:52,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:30:52,858 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 13:30:52,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash -625179532, now seen corresponding path program 1 times [2024-06-14 13:30:52,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:52,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840056037] [2024-06-14 13:30:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840056037] [2024-06-14 13:30:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840056037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630811533] [2024-06-14 13:30:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:56,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:30:56,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 264 transitions, 2795 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 13:30:56,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:56,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:30:56,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:57,689 INFO L124 PetriNetUnfolderBase]: 3080/5020 cut-off events. [2024-06-14 13:30:57,689 INFO L125 PetriNetUnfolderBase]: For 244345/244345 co-relation queries the response was YES. [2024-06-14 13:30:57,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28262 conditions, 5020 events. 3080/5020 cut-off events. For 244345/244345 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30984 event pairs, 741 based on Foata normal form. 8/5020 useless extension candidates. Maximal degree in co-relation 28148. Up to 4328 conditions per place. [2024-06-14 13:30:57,734 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 254 selfloop transitions, 35 changer transitions 0/294 dead transitions. [2024-06-14 13:30:57,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 294 transitions, 3641 flow [2024-06-14 13:30:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:30:57,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:30:57,735 INFO L175 Difference]: Start difference. First operand has 236 places, 264 transitions, 2795 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:30:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 294 transitions, 3641 flow [2024-06-14 13:30:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 294 transitions, 3500 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:30:58,340 INFO L231 Difference]: Finished difference. Result has 235 places, 264 transitions, 2728 flow [2024-06-14 13:30:58,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2728, PETRI_PLACES=235, PETRI_TRANSITIONS=264} [2024-06-14 13:30:58,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 13:30:58,341 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 264 transitions, 2728 flow [2024-06-14 13:30:58,341 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 13:30:58,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:58,341 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 13:30:58,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:30:58,341 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 13:30:58,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:58,342 INFO L85 PathProgramCache]: Analyzing trace with hash 985495650, now seen corresponding path program 2 times [2024-06-14 13:30:58,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166827102] [2024-06-14 13:30:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166827102] [2024-06-14 13:31:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166827102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:02,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:02,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:02,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537032458] [2024-06-14 13:31:02,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:02,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:02,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:02,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:02,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 264 transitions, 2728 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 13:31:02,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:02,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:02,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:03,778 INFO L124 PetriNetUnfolderBase]: 3062/4994 cut-off events. [2024-06-14 13:31:03,778 INFO L125 PetriNetUnfolderBase]: For 227567/227567 co-relation queries the response was YES. [2024-06-14 13:31:03,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27309 conditions, 4994 events. 3062/4994 cut-off events. For 227567/227567 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30873 event pairs, 842 based on Foata normal form. 8/4994 useless extension candidates. Maximal degree in co-relation 27194. Up to 4432 conditions per place. [2024-06-14 13:31:03,825 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 248 selfloop transitions, 35 changer transitions 0/288 dead transitions. [2024-06-14 13:31:03,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 288 transitions, 3398 flow [2024-06-14 13:31:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:31:03,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:31:03,826 INFO L175 Difference]: Start difference. First operand has 235 places, 264 transitions, 2728 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:31:03,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 288 transitions, 3398 flow [2024-06-14 13:31:04,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 288 transitions, 3287 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:04,270 INFO L231 Difference]: Finished difference. Result has 236 places, 264 transitions, 2693 flow [2024-06-14 13:31:04,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2693, PETRI_PLACES=236, PETRI_TRANSITIONS=264} [2024-06-14 13:31:04,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 13:31:04,271 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 264 transitions, 2693 flow [2024-06-14 13:31:04,271 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 13:31:04,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:04,271 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, 1] [2024-06-14 13:31:04,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:31:04,271 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 13:31:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash 301740306, now seen corresponding path program 1 times [2024-06-14 13:31:04,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:04,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146359207] [2024-06-14 13:31:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:07,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146359207] [2024-06-14 13:31:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146359207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520132725] [2024-06-14 13:31:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:07,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:07,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:07,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 264 transitions, 2693 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 13:31:07,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:09,062 INFO L124 PetriNetUnfolderBase]: 3082/5036 cut-off events. [2024-06-14 13:31:09,062 INFO L125 PetriNetUnfolderBase]: For 221209/221209 co-relation queries the response was YES. [2024-06-14 13:31:09,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27155 conditions, 5036 events. 3082/5036 cut-off events. For 221209/221209 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31141 event pairs, 665 based on Foata normal form. 4/5032 useless extension candidates. Maximal degree in co-relation 27040. Up to 4192 conditions per place. [2024-06-14 13:31:09,112 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 89 changer transitions 0/291 dead transitions. [2024-06-14 13:31:09,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 291 transitions, 3375 flow [2024-06-14 13:31:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:31:09,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:31:09,113 INFO L175 Difference]: Start difference. First operand has 236 places, 264 transitions, 2693 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:31:09,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 291 transitions, 3375 flow [2024-06-14 13:31:09,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 291 transitions, 3287 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:09,624 INFO L231 Difference]: Finished difference. Result has 237 places, 267 transitions, 2842 flow [2024-06-14 13:31:09,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2842, PETRI_PLACES=237, PETRI_TRANSITIONS=267} [2024-06-14 13:31:09,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 13:31:09,625 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 267 transitions, 2842 flow [2024-06-14 13:31:09,625 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 13:31:09,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:09,625 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, 1, 1] [2024-06-14 13:31:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:31:09,625 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 13:31:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1165464570, now seen corresponding path program 2 times [2024-06-14 13:31:09,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:09,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535346123] [2024-06-14 13:31:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535346123] [2024-06-14 13:31:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535346123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:13,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279538146] [2024-06-14 13:31:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:13,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:13,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 267 transitions, 2842 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 13:31:13,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:13,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:13,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:15,242 INFO L124 PetriNetUnfolderBase]: 3102/5072 cut-off events. [2024-06-14 13:31:15,242 INFO L125 PetriNetUnfolderBase]: For 226897/226897 co-relation queries the response was YES. [2024-06-14 13:31:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27648 conditions, 5072 events. 3102/5072 cut-off events. For 226897/226897 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31484 event pairs, 703 based on Foata normal form. 4/5068 useless extension candidates. Maximal degree in co-relation 27532. Up to 3888 conditions per place. [2024-06-14 13:31:15,296 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 110 changer transitions 0/301 dead transitions. [2024-06-14 13:31:15,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 3722 flow [2024-06-14 13:31:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:31:15,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:31:15,297 INFO L175 Difference]: Start difference. First operand has 237 places, 267 transitions, 2842 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:31:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 3722 flow [2024-06-14 13:31:15,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 301 transitions, 3530 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:15,954 INFO L231 Difference]: Finished difference. Result has 239 places, 270 transitions, 2921 flow [2024-06-14 13:31:15,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2921, PETRI_PLACES=239, PETRI_TRANSITIONS=270} [2024-06-14 13:31:15,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:31:15,955 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 270 transitions, 2921 flow [2024-06-14 13:31:15,955 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 13:31:15,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:15,955 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 13:31:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:31:15,955 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 13:31:15,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1174254924, now seen corresponding path program 3 times [2024-06-14 13:31:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:15,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921348048] [2024-06-14 13:31:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:19,124 INFO 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 13:31:19,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921348048] [2024-06-14 13:31:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921348048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:19,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:19,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:19,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566795111] [2024-06-14 13:31:19,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:19,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:19,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:19,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 270 transitions, 2921 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 13:31:19,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:19,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:19,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:20,899 INFO L124 PetriNetUnfolderBase]: 3122/5098 cut-off events. [2024-06-14 13:31:20,899 INFO L125 PetriNetUnfolderBase]: For 228091/228091 co-relation queries the response was YES. [2024-06-14 13:31:20,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27914 conditions, 5098 events. 3122/5098 cut-off events. For 228091/228091 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31607 event pairs, 693 based on Foata normal form. 4/5094 useless extension candidates. Maximal degree in co-relation 27798. Up to 3904 conditions per place. [2024-06-14 13:31:20,952 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 114 changer transitions 0/302 dead transitions. [2024-06-14 13:31:20,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 302 transitions, 3947 flow [2024-06-14 13:31:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:31:20,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:31:20,953 INFO L175 Difference]: Start difference. First operand has 239 places, 270 transitions, 2921 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:31:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 302 transitions, 3947 flow [2024-06-14 13:31:21,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 302 transitions, 3695 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:21,580 INFO L231 Difference]: Finished difference. Result has 241 places, 273 transitions, 2951 flow [2024-06-14 13:31:21,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2951, PETRI_PLACES=241, PETRI_TRANSITIONS=273} [2024-06-14 13:31:21,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 13:31:21,580 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 273 transitions, 2951 flow [2024-06-14 13:31:21,580 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 13:31:21,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:21,580 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 13:31:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:31:21,580 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 13:31:21,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 387204900, now seen corresponding path program 4 times [2024-06-14 13:31:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:21,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532237468] [2024-06-14 13:31:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:24,522 INFO 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 13:31:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:24,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532237468] [2024-06-14 13:31:24,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532237468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:24,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:24,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187752323] [2024-06-14 13:31:24,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:24,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:24,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 273 transitions, 2951 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 13:31:24,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:24,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:26,306 INFO L124 PetriNetUnfolderBase]: 3110/5078 cut-off events. [2024-06-14 13:31:26,306 INFO L125 PetriNetUnfolderBase]: For 221889/221889 co-relation queries the response was YES. [2024-06-14 13:31:26,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27410 conditions, 5078 events. 3110/5078 cut-off events. For 221889/221889 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31470 event pairs, 695 based on Foata normal form. 4/5074 useless extension candidates. Maximal degree in co-relation 27294. Up to 3896 conditions per place. [2024-06-14 13:31:26,362 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 187 selfloop transitions, 109 changer transitions 0/301 dead transitions. [2024-06-14 13:31:26,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 301 transitions, 3777 flow [2024-06-14 13:31:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:31:26,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:31:26,363 INFO L175 Difference]: Start difference. First operand has 241 places, 273 transitions, 2951 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:31:26,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 301 transitions, 3777 flow [2024-06-14 13:31:26,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 301 transitions, 3432 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:26,914 INFO L231 Difference]: Finished difference. Result has 242 places, 273 transitions, 2832 flow [2024-06-14 13:31:26,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2832, PETRI_PLACES=242, PETRI_TRANSITIONS=273} [2024-06-14 13:31:26,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 13:31:26,914 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 273 transitions, 2832 flow [2024-06-14 13:31:26,914 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 13:31:26,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:26,914 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 13:31:26,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:31:26,914 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 13:31:26,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 548511214, now seen corresponding path program 5 times [2024-06-14 13:31:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:26,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269808631] [2024-06-14 13:31:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:26,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:30,077 INFO 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 13:31:30,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:30,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269808631] [2024-06-14 13:31:30,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269808631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:30,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:30,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:30,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400662180] [2024-06-14 13:31:30,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:30,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:30,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:30,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:30,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:30,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:30,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 273 transitions, 2832 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 13:31:30,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:30,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:30,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:31,819 INFO L124 PetriNetUnfolderBase]: 3130/5126 cut-off events. [2024-06-14 13:31:31,819 INFO L125 PetriNetUnfolderBase]: For 225560/225560 co-relation queries the response was YES. [2024-06-14 13:31:31,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27463 conditions, 5126 events. 3130/5126 cut-off events. For 225560/225560 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 31964 event pairs, 850 based on Foata normal form. 4/5122 useless extension candidates. Maximal degree in co-relation 27346. Up to 4446 conditions per place. [2024-06-14 13:31:31,870 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 233 selfloop transitions, 65 changer transitions 0/303 dead transitions. [2024-06-14 13:31:31,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 303 transitions, 3690 flow [2024-06-14 13:31:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:31:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:31:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:31:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:31:31,871 INFO L175 Difference]: Start difference. First operand has 242 places, 273 transitions, 2832 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:31:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 303 transitions, 3690 flow [2024-06-14 13:31:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 303 transitions, 3440 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:32,639 INFO L231 Difference]: Finished difference. Result has 245 places, 276 transitions, 2754 flow [2024-06-14 13:31:32,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2754, PETRI_PLACES=245, PETRI_TRANSITIONS=276} [2024-06-14 13:31:32,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:31:32,640 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 276 transitions, 2754 flow [2024-06-14 13:31:32,640 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 13:31:32,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:32,640 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, 1] [2024-06-14 13:31:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:31:32,640 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 13:31:32,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1691763238, now seen corresponding path program 6 times [2024-06-14 13:31:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:32,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385393397] [2024-06-14 13:31:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:35,630 INFO 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 13:31:35,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:35,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385393397] [2024-06-14 13:31:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385393397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242891846] [2024-06-14 13:31:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:35,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:35,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:35,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:35,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 276 transitions, 2754 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 13:31:35,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:35,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:37,261 INFO L124 PetriNetUnfolderBase]: 3150/5142 cut-off events. [2024-06-14 13:31:37,261 INFO L125 PetriNetUnfolderBase]: For 230476/230476 co-relation queries the response was YES. [2024-06-14 13:31:37,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27330 conditions, 5142 events. 3150/5142 cut-off events. For 230476/230476 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31906 event pairs, 854 based on Foata normal form. 4/5138 useless extension candidates. Maximal degree in co-relation 27212. Up to 4462 conditions per place. [2024-06-14 13:31:37,317 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 234 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-14 13:31:37,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 301 transitions, 3600 flow [2024-06-14 13:31:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:31:37,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:31:37,318 INFO L175 Difference]: Start difference. First operand has 245 places, 276 transitions, 2754 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:31:37,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 301 transitions, 3600 flow [2024-06-14 13:31:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 301 transitions, 3381 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:38,045 INFO L231 Difference]: Finished difference. Result has 244 places, 279 transitions, 2701 flow [2024-06-14 13:31:38,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2701, PETRI_PLACES=244, PETRI_TRANSITIONS=279} [2024-06-14 13:31:38,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 13:31:38,046 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 279 transitions, 2701 flow [2024-06-14 13:31:38,046 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 13:31:38,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:38,046 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 13:31:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:31:38,047 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 13:31:38,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2122491406, now seen corresponding path program 7 times [2024-06-14 13:31:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:38,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751117519] [2024-06-14 13:31:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:41,347 INFO 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 13:31:41,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:41,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751117519] [2024-06-14 13:31:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751117519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:41,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687569027] [2024-06-14 13:31:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:41,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:41,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:41,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 279 transitions, 2701 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 13:31:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:43,140 INFO L124 PetriNetUnfolderBase]: 3138/5122 cut-off events. [2024-06-14 13:31:43,140 INFO L125 PetriNetUnfolderBase]: For 222345/222345 co-relation queries the response was YES. [2024-06-14 13:31:43,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 5122 events. 3138/5122 cut-off events. For 222345/222345 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31803 event pairs, 846 based on Foata normal form. 4/5118 useless extension candidates. Maximal degree in co-relation 26780. Up to 4454 conditions per place. [2024-06-14 13:31:43,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 234 selfloop transitions, 61 changer transitions 0/300 dead transitions. [2024-06-14 13:31:43,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 300 transitions, 3351 flow [2024-06-14 13:31:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:31:43,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:31:43,189 INFO L175 Difference]: Start difference. First operand has 244 places, 279 transitions, 2701 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:31:43,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 300 transitions, 3351 flow [2024-06-14 13:31:43,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 300 transitions, 3205 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:43,872 INFO L231 Difference]: Finished difference. Result has 246 places, 279 transitions, 2685 flow [2024-06-14 13:31:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2685, PETRI_PLACES=246, PETRI_TRANSITIONS=279} [2024-06-14 13:31:43,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:31:43,873 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 279 transitions, 2685 flow [2024-06-14 13:31:43,873 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 13:31:43,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:43,873 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 13:31:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:31:43,874 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 13:31:43,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1721466036, now seen corresponding path program 1 times [2024-06-14 13:31:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864333591] [2024-06-14 13:31:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:47,062 INFO 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 13:31:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864333591] [2024-06-14 13:31:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864333591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:47,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:47,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:47,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159137099] [2024-06-14 13:31:47,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:47,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:47,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 279 transitions, 2685 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 13:31:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:47,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:48,845 INFO L124 PetriNetUnfolderBase]: 3318/5410 cut-off events. [2024-06-14 13:31:48,845 INFO L125 PetriNetUnfolderBase]: For 392103/392103 co-relation queries the response was YES. [2024-06-14 13:31:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 5410 events. 3318/5410 cut-off events. For 392103/392103 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33580 event pairs, 844 based on Foata normal form. 56/5458 useless extension candidates. Maximal degree in co-relation 28026. Up to 4420 conditions per place. [2024-06-14 13:31:48,902 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 253 selfloop transitions, 58 changer transitions 5/321 dead transitions. [2024-06-14 13:31:48,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 321 transitions, 3543 flow [2024-06-14 13:31:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:31:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:31:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 13:31:48,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:31:48,903 INFO L175 Difference]: Start difference. First operand has 246 places, 279 transitions, 2685 flow. Second operand 10 states and 175 transitions. [2024-06-14 13:31:48,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 321 transitions, 3543 flow [2024-06-14 13:31:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 321 transitions, 3358 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:31:49,816 INFO L231 Difference]: Finished difference. Result has 249 places, 282 transitions, 2694 flow [2024-06-14 13:31:49,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2694, PETRI_PLACES=249, PETRI_TRANSITIONS=282} [2024-06-14 13:31:49,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 13:31:49,816 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 282 transitions, 2694 flow [2024-06-14 13:31:49,816 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 13:31:49,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:49,817 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 13:31:49,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:31:49,817 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 13:31:49,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1686163300, now seen corresponding path program 2 times [2024-06-14 13:31:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990656313] [2024-06-14 13:31:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990656313] [2024-06-14 13:31:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990656313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:53,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295767022] [2024-06-14 13:31:53,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:53,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:53,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 282 transitions, 2694 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 13:31:53,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:53,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:53,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:54,896 INFO L124 PetriNetUnfolderBase]: 3514/5704 cut-off events. [2024-06-14 13:31:54,896 INFO L125 PetriNetUnfolderBase]: For 376245/376245 co-relation queries the response was YES. [2024-06-14 13:31:54,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32697 conditions, 5704 events. 3514/5704 cut-off events. For 376245/376245 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35150 event pairs, 826 based on Foata normal form. 8/5704 useless extension candidates. Maximal degree in co-relation 32576. Up to 3780 conditions per place. [2024-06-14 13:31:54,958 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 256 selfloop transitions, 62 changer transitions 0/323 dead transitions. [2024-06-14 13:31:54,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 323 transitions, 3712 flow [2024-06-14 13:31:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:31:54,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:31:54,960 INFO L175 Difference]: Start difference. First operand has 249 places, 282 transitions, 2694 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:31:54,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 323 transitions, 3712 flow [2024-06-14 13:31:55,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 323 transitions, 3610 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:55,699 INFO L231 Difference]: Finished difference. Result has 253 places, 285 transitions, 2799 flow [2024-06-14 13:31:55,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2799, PETRI_PLACES=253, PETRI_TRANSITIONS=285} [2024-06-14 13:31:55,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 13:31:55,699 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 285 transitions, 2799 flow [2024-06-14 13:31:55,700 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 13:31:55,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:55,700 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 13:31:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:31:55,700 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 13:31:55,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1679497060, now seen corresponding path program 3 times [2024-06-14 13:31:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226302096] [2024-06-14 13:31:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226302096] [2024-06-14 13:31:59,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226302096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:59,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:59,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:59,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358513594] [2024-06-14 13:31:59,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:59,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:31:59,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 285 transitions, 2799 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 13:31:59,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:59,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:31:59,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:00,737 INFO L124 PetriNetUnfolderBase]: 3496/5690 cut-off events. [2024-06-14 13:32:00,737 INFO L125 PetriNetUnfolderBase]: For 361233/361233 co-relation queries the response was YES. [2024-06-14 13:32:00,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32484 conditions, 5690 events. 3496/5690 cut-off events. For 361233/361233 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35306 event pairs, 1010 based on Foata normal form. 8/5690 useless extension candidates. Maximal degree in co-relation 32360. Up to 3772 conditions per place. [2024-06-14 13:32:00,796 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-14 13:32:00,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 322 transitions, 3771 flow [2024-06-14 13:32:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:32:00,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:32:00,798 INFO L175 Difference]: Start difference. First operand has 253 places, 285 transitions, 2799 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:32:00,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 322 transitions, 3771 flow [2024-06-14 13:32:01,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 322 transitions, 3671 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:01,765 INFO L231 Difference]: Finished difference. Result has 257 places, 285 transitions, 2827 flow [2024-06-14 13:32:01,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2827, PETRI_PLACES=257, PETRI_TRANSITIONS=285} [2024-06-14 13:32:01,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 13:32:01,766 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 285 transitions, 2827 flow [2024-06-14 13:32:01,766 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 13:32:01,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:01,766 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, 1] [2024-06-14 13:32:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:32:01,766 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 13:32:01,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1665842168, now seen corresponding path program 1 times [2024-06-14 13:32:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:01,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397740923] [2024-06-14 13:32:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:04,786 INFO 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 13:32:04,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:04,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397740923] [2024-06-14 13:32:04,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397740923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:04,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401968737] [2024-06-14 13:32:04,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:04,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:04,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 285 transitions, 2827 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 13:32:04,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:04,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:06,849 INFO L124 PetriNetUnfolderBase]: 3629/5949 cut-off events. [2024-06-14 13:32:06,849 INFO L125 PetriNetUnfolderBase]: For 432862/432862 co-relation queries the response was YES. [2024-06-14 13:32:06,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35527 conditions, 5949 events. 3629/5949 cut-off events. For 432862/432862 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37549 event pairs, 887 based on Foata normal form. 8/5956 useless extension candidates. Maximal degree in co-relation 35402. Up to 4340 conditions per place. [2024-06-14 13:32:06,920 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 290 selfloop transitions, 53 changer transitions 7/355 dead transitions. [2024-06-14 13:32:06,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 355 transitions, 4199 flow [2024-06-14 13:32:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:32:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:32:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 13:32:06,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-14 13:32:06,921 INFO L175 Difference]: Start difference. First operand has 257 places, 285 transitions, 2827 flow. Second operand 10 states and 199 transitions. [2024-06-14 13:32:06,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 355 transitions, 4199 flow [2024-06-14 13:32:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 355 transitions, 3998 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:32:07,755 INFO L231 Difference]: Finished difference. Result has 258 places, 288 transitions, 2811 flow [2024-06-14 13:32:07,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2811, PETRI_PLACES=258, PETRI_TRANSITIONS=288} [2024-06-14 13:32:07,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 13:32:07,755 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 288 transitions, 2811 flow [2024-06-14 13:32:07,756 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 13:32:07,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:07,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:32:07,756 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 13:32:07,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1719436040, now seen corresponding path program 2 times [2024-06-14 13:32:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351332749] [2024-06-14 13:32:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:11,522 INFO 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 13:32:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351332749] [2024-06-14 13:32:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351332749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:11,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023730039] [2024-06-14 13:32:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:11,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:11,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 288 transitions, 2811 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 13:32:11,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:11,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:11,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:13,450 INFO L124 PetriNetUnfolderBase]: 3451/5661 cut-off events. [2024-06-14 13:32:13,450 INFO L125 PetriNetUnfolderBase]: For 300783/300783 co-relation queries the response was YES. [2024-06-14 13:32:13,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30676 conditions, 5661 events. 3451/5661 cut-off events. For 300783/300783 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35704 event pairs, 925 based on Foata normal form. 8/5668 useless extension candidates. Maximal degree in co-relation 30552. Up to 5075 conditions per place. [2024-06-14 13:32:13,499 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 43 changer transitions 4/334 dead transitions. [2024-06-14 13:32:13,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 334 transitions, 3653 flow [2024-06-14 13:32:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:32:13,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:32:13,500 INFO L175 Difference]: Start difference. First operand has 258 places, 288 transitions, 2811 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:32:13,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 334 transitions, 3653 flow [2024-06-14 13:32:14,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 334 transitions, 3556 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:14,548 INFO L231 Difference]: Finished difference. Result has 262 places, 289 transitions, 2832 flow [2024-06-14 13:32:14,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2832, PETRI_PLACES=262, PETRI_TRANSITIONS=289} [2024-06-14 13:32:14,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:32:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 289 transitions, 2832 flow [2024-06-14 13:32:14,549 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 13:32:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:14,549 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, 1] [2024-06-14 13:32:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:32:14,549 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 13:32:14,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -893551798, now seen corresponding path program 3 times [2024-06-14 13:32:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874565800] [2024-06-14 13:32:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:17,791 INFO 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 13:32:17,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874565800] [2024-06-14 13:32:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874565800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:17,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:17,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87647723] [2024-06-14 13:32:17,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:17,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:17,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:17,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:17,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 289 transitions, 2832 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 13:32:17,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:17,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:17,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:19,688 INFO L124 PetriNetUnfolderBase]: 3487/5715 cut-off events. [2024-06-14 13:32:19,689 INFO L125 PetriNetUnfolderBase]: For 314430/314430 co-relation queries the response was YES. [2024-06-14 13:32:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30806 conditions, 5715 events. 3487/5715 cut-off events. For 314430/314430 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36174 event pairs, 1022 based on Foata normal form. 10/5724 useless extension candidates. Maximal degree in co-relation 30680. Up to 4804 conditions per place. [2024-06-14 13:32:19,752 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 295 selfloop transitions, 41 changer transitions 1/342 dead transitions. [2024-06-14 13:32:19,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 342 transitions, 3908 flow [2024-06-14 13:32:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:32:19,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:32:19,753 INFO L175 Difference]: Start difference. First operand has 262 places, 289 transitions, 2832 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:32:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 342 transitions, 3908 flow [2024-06-14 13:32:20,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 342 transitions, 3818 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:20,795 INFO L231 Difference]: Finished difference. Result has 264 places, 290 transitions, 2847 flow [2024-06-14 13:32:20,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2847, PETRI_PLACES=264, PETRI_TRANSITIONS=290} [2024-06-14 13:32:20,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 13:32:20,796 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 290 transitions, 2847 flow [2024-06-14 13:32:20,796 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 13:32:20,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:20,796 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, 1, 1, 1, 1] [2024-06-14 13:32:20,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:32:20,796 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 13:32:20,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2036290390, now seen corresponding path program 4 times [2024-06-14 13:32:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115672236] [2024-06-14 13:32:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:24,062 INFO 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 13:32:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115672236] [2024-06-14 13:32:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115672236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:24,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:24,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:24,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215962932] [2024-06-14 13:32:24,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:24,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:24,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:24,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:24,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 290 transitions, 2847 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 13:32:24,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:24,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:26,013 INFO L124 PetriNetUnfolderBase]: 3464/5688 cut-off events. [2024-06-14 13:32:26,013 INFO L125 PetriNetUnfolderBase]: For 287437/287437 co-relation queries the response was YES. [2024-06-14 13:32:26,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29857 conditions, 5688 events. 3464/5688 cut-off events. For 287437/287437 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36140 event pairs, 1077 based on Foata normal form. 10/5697 useless extension candidates. Maximal degree in co-relation 29730. Up to 5162 conditions per place. [2024-06-14 13:32:26,069 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 40 changer transitions 1/333 dead transitions. [2024-06-14 13:32:26,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 333 transitions, 3663 flow [2024-06-14 13:32:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:32:26,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:32:26,071 INFO L175 Difference]: Start difference. First operand has 264 places, 290 transitions, 2847 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:32:26,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 333 transitions, 3663 flow [2024-06-14 13:32:26,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 333 transitions, 3531 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:32:26,775 INFO L231 Difference]: Finished difference. Result has 265 places, 290 transitions, 2800 flow [2024-06-14 13:32:26,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2800, PETRI_PLACES=265, PETRI_TRANSITIONS=290} [2024-06-14 13:32:26,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 13:32:26,776 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 290 transitions, 2800 flow [2024-06-14 13:32:26,776 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 13:32:26,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:26,776 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, 1] [2024-06-14 13:32:26,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:32:26,776 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 13:32:26,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 572148788, now seen corresponding path program 5 times [2024-06-14 13:32:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909246827] [2024-06-14 13:32:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:30,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:30,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909246827] [2024-06-14 13:32:30,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909246827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:30,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:30,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260778127] [2024-06-14 13:32:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:30,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:30,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:30,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 290 transitions, 2800 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 13:32:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:32,593 INFO L124 PetriNetUnfolderBase]: 3492/5726 cut-off events. [2024-06-14 13:32:32,593 INFO L125 PetriNetUnfolderBase]: For 285179/285179 co-relation queries the response was YES. [2024-06-14 13:32:32,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29853 conditions, 5726 events. 3492/5726 cut-off events. For 285179/285179 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36346 event pairs, 1104 based on Foata normal form. 8/5733 useless extension candidates. Maximal degree in co-relation 29726. Up to 5266 conditions per place. [2024-06-14 13:32:32,654 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 35 changer transitions 1/328 dead transitions. [2024-06-14 13:32:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 328 transitions, 3592 flow [2024-06-14 13:32:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:32:32,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:32:32,655 INFO L175 Difference]: Start difference. First operand has 265 places, 290 transitions, 2800 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:32:32,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 328 transitions, 3592 flow [2024-06-14 13:32:33,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 328 transitions, 3506 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:32:33,755 INFO L231 Difference]: Finished difference. Result has 266 places, 291 transitions, 2808 flow [2024-06-14 13:32:33,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2808, PETRI_PLACES=266, PETRI_TRANSITIONS=291} [2024-06-14 13:32:33,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 13:32:33,756 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 291 transitions, 2808 flow [2024-06-14 13:32:33,756 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 13:32:33,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:33,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:33,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:32:33,756 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 13:32:33,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash -322460620, now seen corresponding path program 6 times [2024-06-14 13:32:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:33,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612661501] [2024-06-14 13:32:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:36,971 INFO 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 13:32:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612661501] [2024-06-14 13:32:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612661501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:36,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:36,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94869752] [2024-06-14 13:32:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:36,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:36,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:36,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:36,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 291 transitions, 2808 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 13:32:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:39,349 INFO L124 PetriNetUnfolderBase]: 3819/6251 cut-off events. [2024-06-14 13:32:39,349 INFO L125 PetriNetUnfolderBase]: For 509304/509307 co-relation queries the response was YES. [2024-06-14 13:32:39,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36896 conditions, 6251 events. 3819/6251 cut-off events. For 509304/509307 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39744 event pairs, 1002 based on Foata normal form. 12/6260 useless extension candidates. Maximal degree in co-relation 36768. Up to 4330 conditions per place. [2024-06-14 13:32:39,411 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 208 selfloop transitions, 136 changer transitions 0/349 dead transitions. [2024-06-14 13:32:39,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 349 transitions, 3946 flow [2024-06-14 13:32:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 13:32:39,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-14 13:32:39,412 INFO L175 Difference]: Start difference. First operand has 266 places, 291 transitions, 2808 flow. Second operand 9 states and 185 transitions. [2024-06-14 13:32:39,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 349 transitions, 3946 flow [2024-06-14 13:32:40,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 3870 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:40,409 INFO L231 Difference]: Finished difference. Result has 268 places, 293 transitions, 3058 flow [2024-06-14 13:32:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3058, PETRI_PLACES=268, PETRI_TRANSITIONS=293} [2024-06-14 13:32:40,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 13:32:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 293 transitions, 3058 flow [2024-06-14 13:32:40,410 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 13:32:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:40,410 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, 1] [2024-06-14 13:32:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:32:40,411 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 13:32:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -956489616, now seen corresponding path program 7 times [2024-06-14 13:32:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:40,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796323827] [2024-06-14 13:32:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:43,815 INFO 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 13:32:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796323827] [2024-06-14 13:32:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796323827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:43,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146352294] [2024-06-14 13:32:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:43,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 293 transitions, 3058 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 13:32:43,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:43,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:43,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:46,077 INFO L124 PetriNetUnfolderBase]: 3855/6307 cut-off events. [2024-06-14 13:32:46,078 INFO L125 PetriNetUnfolderBase]: For 525136/525139 co-relation queries the response was YES. [2024-06-14 13:32:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38007 conditions, 6307 events. 3855/6307 cut-off events. For 525136/525139 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40288 event pairs, 1024 based on Foata normal form. 12/6316 useless extension candidates. Maximal degree in co-relation 37878. Up to 5009 conditions per place. [2024-06-14 13:32:46,141 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 135 changer transitions 0/338 dead transitions. [2024-06-14 13:32:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 338 transitions, 3910 flow [2024-06-14 13:32:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:32:46,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:32:46,142 INFO L175 Difference]: Start difference. First operand has 268 places, 293 transitions, 3058 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:32:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 338 transitions, 3910 flow [2024-06-14 13:32:47,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 338 transitions, 3693 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:47,187 INFO L231 Difference]: Finished difference. Result has 272 places, 294 transitions, 3144 flow [2024-06-14 13:32:47,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3144, PETRI_PLACES=272, PETRI_TRANSITIONS=294} [2024-06-14 13:32:47,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 13:32:47,187 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 294 transitions, 3144 flow [2024-06-14 13:32:47,187 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 13:32:47,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:47,187 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, 1] [2024-06-14 13:32:47,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:32:47,188 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 13:32:47,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -387219698, now seen corresponding path program 8 times [2024-06-14 13:32:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239454536] [2024-06-14 13:32:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:50,880 INFO 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 13:32:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239454536] [2024-06-14 13:32:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239454536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:50,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354978207] [2024-06-14 13:32:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:50,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:50,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 294 transitions, 3144 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 13:32:50,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:50,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:50,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:53,148 INFO L124 PetriNetUnfolderBase]: 3891/6357 cut-off events. [2024-06-14 13:32:53,148 INFO L125 PetriNetUnfolderBase]: For 534242/534245 co-relation queries the response was YES. [2024-06-14 13:32:53,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38559 conditions, 6357 events. 3891/6357 cut-off events. For 534242/534245 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40645 event pairs, 1032 based on Foata normal form. 12/6366 useless extension candidates. Maximal degree in co-relation 38428. Up to 5065 conditions per place. [2024-06-14 13:32:53,208 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 133 changer transitions 0/334 dead transitions. [2024-06-14 13:32:53,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 334 transitions, 3962 flow [2024-06-14 13:32:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:32:53,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:32:53,209 INFO L175 Difference]: Start difference. First operand has 272 places, 294 transitions, 3144 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:32:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 334 transitions, 3962 flow [2024-06-14 13:32:54,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 334 transitions, 3689 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:54,538 INFO L231 Difference]: Finished difference. Result has 274 places, 295 transitions, 3162 flow [2024-06-14 13:32:54,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3162, PETRI_PLACES=274, PETRI_TRANSITIONS=295} [2024-06-14 13:32:54,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 13:32:54,539 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 295 transitions, 3162 flow [2024-06-14 13:32:54,539 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 13:32:54,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:54,539 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, 1] [2024-06-14 13:32:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:32:54,539 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 13:32:54,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 933265990, now seen corresponding path program 9 times [2024-06-14 13:32:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982088439] [2024-06-14 13:32:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982088439] [2024-06-14 13:32:58,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982088439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:58,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143251729] [2024-06-14 13:32:58,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:58,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:58,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:58,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:32:58,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 295 transitions, 3162 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 13:32:58,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:58,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:32:58,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:00,197 INFO L124 PetriNetUnfolderBase]: 3873/6331 cut-off events. [2024-06-14 13:33:00,198 INFO L125 PetriNetUnfolderBase]: For 504358/504358 co-relation queries the response was YES. [2024-06-14 13:33:00,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37772 conditions, 6331 events. 3873/6331 cut-off events. For 504358/504358 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 40528 event pairs, 1253 based on Foata normal form. 8/6338 useless extension candidates. Maximal degree in co-relation 37640. Up to 5861 conditions per place. [2024-06-14 13:33:00,262 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 286 selfloop transitions, 33 changer transitions 0/324 dead transitions. [2024-06-14 13:33:00,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 324 transitions, 3902 flow [2024-06-14 13:33:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:33:00,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:33:00,264 INFO L175 Difference]: Start difference. First operand has 274 places, 295 transitions, 3162 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:33:00,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 324 transitions, 3902 flow [2024-06-14 13:33:01,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 324 transitions, 3627 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:01,533 INFO L231 Difference]: Finished difference. Result has 276 places, 295 transitions, 2957 flow [2024-06-14 13:33:01,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2887, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2957, PETRI_PLACES=276, PETRI_TRANSITIONS=295} [2024-06-14 13:33:01,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:33:01,534 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 295 transitions, 2957 flow [2024-06-14 13:33:01,534 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 13:33:01,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:01,534 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, 1] [2024-06-14 13:33:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:33:01,534 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 13:33:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1217053254, now seen corresponding path program 10 times [2024-06-14 13:33:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901289748] [2024-06-14 13:33:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:05,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901289748] [2024-06-14 13:33:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901289748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:05,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:05,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:05,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080250596] [2024-06-14 13:33:05,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:05,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:05,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:05,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 295 transitions, 2957 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 13:33:05,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:05,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:05,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:07,155 INFO L124 PetriNetUnfolderBase]: 3909/6375 cut-off events. [2024-06-14 13:33:07,155 INFO L125 PetriNetUnfolderBase]: For 522526/522526 co-relation queries the response was YES. [2024-06-14 13:33:07,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37589 conditions, 6375 events. 3909/6375 cut-off events. For 522526/522526 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40780 event pairs, 1259 based on Foata normal form. 10/6384 useless extension candidates. Maximal degree in co-relation 37456. Up to 5889 conditions per place. [2024-06-14 13:33:07,233 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 38 changer transitions 0/327 dead transitions. [2024-06-14 13:33:07,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 327 transitions, 3739 flow [2024-06-14 13:33:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:33:07,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:33:07,234 INFO L175 Difference]: Start difference. First operand has 276 places, 295 transitions, 2957 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:33:07,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 327 transitions, 3739 flow [2024-06-14 13:33:08,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 327 transitions, 3669 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:08,578 INFO L231 Difference]: Finished difference. Result has 278 places, 296 transitions, 2990 flow [2024-06-14 13:33:08,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2887, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2990, PETRI_PLACES=278, PETRI_TRANSITIONS=296} [2024-06-14 13:33:08,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:33:08,578 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 296 transitions, 2990 flow [2024-06-14 13:33:08,578 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 13:33:08,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:08,578 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, 1] [2024-06-14 13:33:08,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:33:08,578 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 13:33:08,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1793595284, now seen corresponding path program 1 times [2024-06-14 13:33:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:08,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387642543] [2024-06-14 13:33:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:08,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:12,255 INFO 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 13:33:12,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:12,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387642543] [2024-06-14 13:33:12,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387642543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:12,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:12,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:12,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665358894] [2024-06-14 13:33:12,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:12,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:12,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:12,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:12,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 296 transitions, 2990 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 13:33:12,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:12,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:14,360 INFO L124 PetriNetUnfolderBase]: 4142/6786 cut-off events. [2024-06-14 13:33:14,361 INFO L125 PetriNetUnfolderBase]: For 695937/695940 co-relation queries the response was YES. [2024-06-14 13:33:14,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43248 conditions, 6786 events. 4142/6786 cut-off events. For 695937/695940 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 43611 event pairs, 1044 based on Foata normal form. 8/6791 useless extension candidates. Maximal degree in co-relation 43114. Up to 3732 conditions per place. [2024-06-14 13:33:14,443 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 143 changer transitions 0/359 dead transitions. [2024-06-14 13:33:14,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 359 transitions, 4376 flow [2024-06-14 13:33:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 13:33:14,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-14 13:33:14,445 INFO L175 Difference]: Start difference. First operand has 278 places, 296 transitions, 2990 flow. Second operand 9 states and 188 transitions. [2024-06-14 13:33:14,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 359 transitions, 4376 flow [2024-06-14 13:33:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 359 transitions, 4293 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:16,216 INFO L231 Difference]: Finished difference. Result has 280 places, 298 transitions, 3251 flow [2024-06-14 13:33:16,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3251, PETRI_PLACES=280, PETRI_TRANSITIONS=298} [2024-06-14 13:33:16,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 13:33:16,216 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 298 transitions, 3251 flow [2024-06-14 13:33:16,217 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 13:33:16,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:16,217 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, 1, 1] [2024-06-14 13:33:16,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:33:16,217 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 13:33:16,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:16,217 INFO L85 PathProgramCache]: Analyzing trace with hash -912896602, now seen corresponding path program 2 times [2024-06-14 13:33:16,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:16,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855997596] [2024-06-14 13:33:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:20,120 INFO 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 13:33:20,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:20,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855997596] [2024-06-14 13:33:20,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855997596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:20,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:20,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:20,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022212724] [2024-06-14 13:33:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:20,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:20,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 298 transitions, 3251 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 13:33:20,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:20,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:20,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:22,531 INFO L124 PetriNetUnfolderBase]: 4162/6814 cut-off events. [2024-06-14 13:33:22,532 INFO L125 PetriNetUnfolderBase]: For 715719/715722 co-relation queries the response was YES. [2024-06-14 13:33:22,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44307 conditions, 6814 events. 4162/6814 cut-off events. For 715719/715722 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43865 event pairs, 1123 based on Foata normal form. 8/6819 useless extension candidates. Maximal degree in co-relation 44172. Up to 3744 conditions per place. [2024-06-14 13:33:22,607 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 144 changer transitions 0/352 dead transitions. [2024-06-14 13:33:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 352 transitions, 4385 flow [2024-06-14 13:33:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 13:33:22,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 13:33:22,608 INFO L175 Difference]: Start difference. First operand has 280 places, 298 transitions, 3251 flow. Second operand 9 states and 180 transitions. [2024-06-14 13:33:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 352 transitions, 4385 flow [2024-06-14 13:33:24,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 352 transitions, 4054 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:24,497 INFO L231 Difference]: Finished difference. Result has 283 places, 299 transitions, 3240 flow [2024-06-14 13:33:24,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3240, PETRI_PLACES=283, PETRI_TRANSITIONS=299} [2024-06-14 13:33:24,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 13:33:24,497 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 299 transitions, 3240 flow [2024-06-14 13:33:24,497 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 13:33:24,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:24,497 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, 1] [2024-06-14 13:33:24,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:33:24,497 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 13:33:24,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1861210934, now seen corresponding path program 3 times [2024-06-14 13:33:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:24,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588162558] [2024-06-14 13:33:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:28,155 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 13:33:28,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:28,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588162558] [2024-06-14 13:33:28,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588162558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:28,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:28,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:28,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447057168] [2024-06-14 13:33:28,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:28,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:28,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:28,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:28,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 299 transitions, 3240 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 13:33:28,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:28,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:28,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:30,468 INFO L124 PetriNetUnfolderBase]: 4182/6858 cut-off events. [2024-06-14 13:33:30,469 INFO L125 PetriNetUnfolderBase]: For 726833/726836 co-relation queries the response was YES. [2024-06-14 13:33:30,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 6858 events. 4182/6858 cut-off events. For 726833/726836 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 44567 event pairs, 1171 based on Foata normal form. 8/6863 useless extension candidates. Maximal degree in co-relation 44300. Up to 5412 conditions per place. [2024-06-14 13:33:30,554 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 201 selfloop transitions, 135 changer transitions 0/341 dead transitions. [2024-06-14 13:33:30,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 341 transitions, 4088 flow [2024-06-14 13:33:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:33:30,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:33:30,556 INFO L175 Difference]: Start difference. First operand has 283 places, 299 transitions, 3240 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:33:30,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 341 transitions, 4088 flow [2024-06-14 13:33:33,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 341 transitions, 3834 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:33,362 INFO L231 Difference]: Finished difference. Result has 286 places, 300 transitions, 3280 flow [2024-06-14 13:33:33,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3280, PETRI_PLACES=286, PETRI_TRANSITIONS=300} [2024-06-14 13:33:33,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:33:33,362 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 300 transitions, 3280 flow [2024-06-14 13:33:33,363 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 13:33:33,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:33,363 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, 1] [2024-06-14 13:33:33,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:33:33,363 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 13:33:33,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash -361714506, now seen corresponding path program 4 times [2024-06-14 13:33:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788525164] [2024-06-14 13:33:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:37,141 INFO 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 13:33:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788525164] [2024-06-14 13:33:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788525164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768923615] [2024-06-14 13:33:37,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:37,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:37,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 300 transitions, 3280 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 13:33:37,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:37,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:39,344 INFO L124 PetriNetUnfolderBase]: 4202/6894 cut-off events. [2024-06-14 13:33:39,344 INFO L125 PetriNetUnfolderBase]: For 742444/742444 co-relation queries the response was YES. [2024-06-14 13:33:39,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44701 conditions, 6894 events. 4202/6894 cut-off events. For 742444/742444 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 44905 event pairs, 1430 based on Foata normal form. 6/6899 useless extension candidates. Maximal degree in co-relation 44564. Up to 6324 conditions per place. [2024-06-14 13:33:39,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 290 selfloop transitions, 39 changer transitions 0/334 dead transitions. [2024-06-14 13:33:39,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 334 transitions, 4091 flow [2024-06-14 13:33:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:33:39,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:33:39,413 INFO L175 Difference]: Start difference. First operand has 286 places, 300 transitions, 3280 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:33:39,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 334 transitions, 4091 flow [2024-06-14 13:33:41,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 334 transitions, 3815 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:41,183 INFO L231 Difference]: Finished difference. Result has 288 places, 301 transitions, 3107 flow [2024-06-14 13:33:41,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3107, PETRI_PLACES=288, PETRI_TRANSITIONS=301} [2024-06-14 13:33:41,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 13:33:41,183 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 301 transitions, 3107 flow [2024-06-14 13:33:41,184 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 13:33:41,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:41,184 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, 1] [2024-06-14 13:33:41,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:33:41,184 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 13:33:41,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1044814360, now seen corresponding path program 11 times [2024-06-14 13:33:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9138919] [2024-06-14 13:33:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:44,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9138919] [2024-06-14 13:33:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9138919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:44,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126966015] [2024-06-14 13:33:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:44,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:44,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 301 transitions, 3107 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 13:33:44,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:44,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:44,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:46,845 INFO L124 PetriNetUnfolderBase]: 4503/7353 cut-off events. [2024-06-14 13:33:46,845 INFO L125 PetriNetUnfolderBase]: For 1012569/1012569 co-relation queries the response was YES. [2024-06-14 13:33:46,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51160 conditions, 7353 events. 4503/7353 cut-off events. For 1012569/1012569 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47893 event pairs, 1272 based on Foata normal form. 10/7355 useless extension candidates. Maximal degree in co-relation 51022. Up to 5394 conditions per place. [2024-06-14 13:33:46,927 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 231 selfloop transitions, 119 changer transitions 0/355 dead transitions. [2024-06-14 13:33:46,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 355 transitions, 4267 flow [2024-06-14 13:33:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 13:33:46,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-14 13:33:46,928 INFO L175 Difference]: Start difference. First operand has 288 places, 301 transitions, 3107 flow. Second operand 9 states and 178 transitions. [2024-06-14 13:33:46,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 355 transitions, 4267 flow [2024-06-14 13:33:48,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 355 transitions, 4181 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:48,682 INFO L231 Difference]: Finished difference. Result has 290 places, 303 transitions, 3317 flow [2024-06-14 13:33:48,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3317, PETRI_PLACES=290, PETRI_TRANSITIONS=303} [2024-06-14 13:33:48,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 13:33:48,683 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 303 transitions, 3317 flow [2024-06-14 13:33:48,684 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 13:33:48,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:48,684 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, 1] [2024-06-14 13:33:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:33:48,684 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 13:33:48,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1044581040, now seen corresponding path program 12 times [2024-06-14 13:33:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241967334] [2024-06-14 13:33:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:52,336 INFO 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 13:33:52,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241967334] [2024-06-14 13:33:52,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241967334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:52,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:52,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:52,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030898148] [2024-06-14 13:33:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:52,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:52,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:52,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:33:52,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 303 transitions, 3317 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 13:33:52,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:52,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:33:52,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:54,752 INFO L124 PetriNetUnfolderBase]: 4539/7409 cut-off events. [2024-06-14 13:33:54,752 INFO L125 PetriNetUnfolderBase]: For 1037789/1037789 co-relation queries the response was YES. [2024-06-14 13:33:54,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52291 conditions, 7409 events. 4539/7409 cut-off events. For 1037789/1037789 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48415 event pairs, 1294 based on Foata normal form. 10/7411 useless extension candidates. Maximal degree in co-relation 52152. Up to 6089 conditions per place. [2024-06-14 13:33:54,847 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 118 changer transitions 0/344 dead transitions. [2024-06-14 13:33:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 344 transitions, 4171 flow [2024-06-14 13:33:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:33:54,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:33:54,850 INFO L175 Difference]: Start difference. First operand has 290 places, 303 transitions, 3317 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:33:54,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 344 transitions, 4171 flow [2024-06-14 13:33:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 344 transitions, 3982 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:57,354 INFO L231 Difference]: Finished difference. Result has 294 places, 304 transitions, 3399 flow [2024-06-14 13:33:57,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3399, PETRI_PLACES=294, PETRI_TRANSITIONS=304} [2024-06-14 13:33:57,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:33:57,354 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 304 transitions, 3399 flow [2024-06-14 13:33:57,354 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 13:33:57,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:57,355 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, 1] [2024-06-14 13:33:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:33:57,355 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 13:33:57,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash -673397354, now seen corresponding path program 13 times [2024-06-14 13:33:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471560224] [2024-06-14 13:33:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:00,987 INFO 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 13:34:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471560224] [2024-06-14 13:34:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471560224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:00,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:00,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566550066] [2024-06-14 13:34:00,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:00,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:00,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:00,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:01,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:01,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 304 transitions, 3399 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 13:34:01,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:01,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:01,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:03,513 INFO L124 PetriNetUnfolderBase]: 4575/7465 cut-off events. [2024-06-14 13:34:03,513 INFO L125 PetriNetUnfolderBase]: For 1055591/1055591 co-relation queries the response was YES. [2024-06-14 13:34:03,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52863 conditions, 7465 events. 4575/7465 cut-off events. For 1055591/1055591 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48802 event pairs, 1296 based on Foata normal form. 10/7467 useless extension candidates. Maximal degree in co-relation 52722. Up to 6145 conditions per place. [2024-06-14 13:34:03,603 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 115 changer transitions 0/341 dead transitions. [2024-06-14 13:34:03,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 341 transitions, 4227 flow [2024-06-14 13:34:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:34:03,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:34:03,605 INFO L175 Difference]: Start difference. First operand has 294 places, 304 transitions, 3399 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:34:03,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 341 transitions, 4227 flow [2024-06-14 13:34:05,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 341 transitions, 3988 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:05,580 INFO L231 Difference]: Finished difference. Result has 296 places, 305 transitions, 3415 flow [2024-06-14 13:34:05,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=296, PETRI_TRANSITIONS=305} [2024-06-14 13:34:05,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 13:34:05,581 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 305 transitions, 3415 flow [2024-06-14 13:34:05,581 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 13:34:05,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:05,581 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, 1] [2024-06-14 13:34:05,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:34:05,581 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 13:34:05,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1117261872, now seen corresponding path program 14 times [2024-06-14 13:34:05,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870458259] [2024-06-14 13:34:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:08,975 INFO 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 13:34:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870458259] [2024-06-14 13:34:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870458259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935533228] [2024-06-14 13:34:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:08,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:09,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 305 transitions, 3415 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 13:34:09,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:09,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:09,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:11,508 INFO L124 PetriNetUnfolderBase]: 4751/7737 cut-off events. [2024-06-14 13:34:11,508 INFO L125 PetriNetUnfolderBase]: For 1298460/1298460 co-relation queries the response was YES. [2024-06-14 13:34:11,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54180 conditions, 7737 events. 4751/7737 cut-off events. For 1298460/1298460 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50819 event pairs, 1332 based on Foata normal form. 54/7783 useless extension candidates. Maximal degree in co-relation 54038. Up to 6185 conditions per place. [2024-06-14 13:34:11,604 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 109 changer transitions 5/342 dead transitions. [2024-06-14 13:34:11,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 342 transitions, 4241 flow [2024-06-14 13:34:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:34:11,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:34:11,606 INFO L175 Difference]: Start difference. First operand has 296 places, 305 transitions, 3415 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:34:11,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 342 transitions, 4241 flow [2024-06-14 13:34:13,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 342 transitions, 4006 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:13,580 INFO L231 Difference]: Finished difference. Result has 298 places, 305 transitions, 3418 flow [2024-06-14 13:34:13,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3418, PETRI_PLACES=298, PETRI_TRANSITIONS=305} [2024-06-14 13:34:13,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 13:34:13,580 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 305 transitions, 3418 flow [2024-06-14 13:34:13,580 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 13:34:13,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:13,581 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, 1] [2024-06-14 13:34:13,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:34:13,581 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 13:34:13,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash -439603306, now seen corresponding path program 15 times [2024-06-14 13:34:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:13,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806482191] [2024-06-14 13:34:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:17,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806482191] [2024-06-14 13:34:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806482191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:17,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:17,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7096550] [2024-06-14 13:34:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:17,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:17,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 305 transitions, 3418 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 13:34:17,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:17,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:17,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:20,024 INFO L124 PetriNetUnfolderBase]: 4616/7540 cut-off events. [2024-06-14 13:34:20,024 INFO L125 PetriNetUnfolderBase]: For 1050029/1050029 co-relation queries the response was YES. [2024-06-14 13:34:20,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48075 conditions, 7540 events. 4616/7540 cut-off events. For 1050029/1050029 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49644 event pairs, 1524 based on Foata normal form. 54/7586 useless extension candidates. Maximal degree in co-relation 47932. Up to 6522 conditions per place. [2024-06-14 13:34:20,116 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 62 changer transitions 5/340 dead transitions. [2024-06-14 13:34:20,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 340 transitions, 4210 flow [2024-06-14 13:34:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:34:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:34:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:34:20,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:34:20,117 INFO L175 Difference]: Start difference. First operand has 298 places, 305 transitions, 3418 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:34:20,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 340 transitions, 4210 flow [2024-06-14 13:34:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 340 transitions, 3979 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:22,508 INFO L231 Difference]: Finished difference. Result has 302 places, 304 transitions, 3308 flow [2024-06-14 13:34:22,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3308, PETRI_PLACES=302, PETRI_TRANSITIONS=304} [2024-06-14 13:34:22,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 13:34:22,509 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 304 transitions, 3308 flow [2024-06-14 13:34:22,509 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 13:34:22,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:22,509 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, 1, 1, 1] [2024-06-14 13:34:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:34:22,509 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 13:34:22,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:22,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1600363694, now seen corresponding path program 16 times [2024-06-14 13:34:22,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:22,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429365374] [2024-06-14 13:34:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:25,790 INFO 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 13:34:25,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:25,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429365374] [2024-06-14 13:34:25,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429365374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:25,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:25,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:25,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977041382] [2024-06-14 13:34:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:25,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:25,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:25,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 304 transitions, 3308 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 13:34:25,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:25,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:25,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:27,819 INFO L124 PetriNetUnfolderBase]: 4481/7339 cut-off events. [2024-06-14 13:34:27,819 INFO L125 PetriNetUnfolderBase]: For 788341/788341 co-relation queries the response was YES. [2024-06-14 13:34:27,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41520 conditions, 7339 events. 4481/7339 cut-off events. For 788341/788341 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48339 event pairs, 1453 based on Foata normal form. 54/7385 useless extension candidates. Maximal degree in co-relation 41376. Up to 6325 conditions per place. [2024-06-14 13:34:27,906 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 56 changer transitions 5/334 dead transitions. [2024-06-14 13:34:27,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 334 transitions, 4078 flow [2024-06-14 13:34:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:34:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:34:27,907 INFO L175 Difference]: Start difference. First operand has 302 places, 304 transitions, 3308 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:34:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 334 transitions, 4078 flow [2024-06-14 13:34:29,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 334 transitions, 3930 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:34:29,214 INFO L231 Difference]: Finished difference. Result has 301 places, 303 transitions, 3270 flow [2024-06-14 13:34:29,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3270, PETRI_PLACES=301, PETRI_TRANSITIONS=303} [2024-06-14 13:34:29,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 13:34:29,215 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 303 transitions, 3270 flow [2024-06-14 13:34:29,215 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 13:34:29,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:29,215 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, 1, 1, 1] [2024-06-14 13:34:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:34:29,215 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 13:34:29,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1176752020, now seen corresponding path program 5 times [2024-06-14 13:34:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424006052] [2024-06-14 13:34:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:29,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:32,916 INFO 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 13:34:32,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:32,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424006052] [2024-06-14 13:34:32,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424006052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:32,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:32,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114997221] [2024-06-14 13:34:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:32,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:32,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 303 transitions, 3270 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 13:34:32,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:32,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:32,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:35,422 INFO L124 PetriNetUnfolderBase]: 4694/7726 cut-off events. [2024-06-14 13:34:35,422 INFO L125 PetriNetUnfolderBase]: For 768124/768124 co-relation queries the response was YES. [2024-06-14 13:34:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47281 conditions, 7726 events. 4694/7726 cut-off events. For 768124/768124 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51315 event pairs, 1222 based on Foata normal form. 6/7724 useless extension candidates. Maximal degree in co-relation 47136. Up to 4959 conditions per place. [2024-06-14 13:34:35,501 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 233 selfloop transitions, 124 changer transitions 0/362 dead transitions. [2024-06-14 13:34:35,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 362 transitions, 4494 flow [2024-06-14 13:34:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 13:34:35,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-14 13:34:35,502 INFO L175 Difference]: Start difference. First operand has 301 places, 303 transitions, 3270 flow. Second operand 9 states and 181 transitions. [2024-06-14 13:34:35,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 362 transitions, 4494 flow [2024-06-14 13:34:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 362 transitions, 4364 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:34:37,824 INFO L231 Difference]: Finished difference. Result has 302 places, 305 transitions, 3450 flow [2024-06-14 13:34:37,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3450, PETRI_PLACES=302, PETRI_TRANSITIONS=305} [2024-06-14 13:34:37,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 13:34:37,824 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 305 transitions, 3450 flow [2024-06-14 13:34:37,824 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 13:34:37,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:37,824 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, 1] [2024-06-14 13:34:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:34:37,825 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 13:34:37,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -561206140, now seen corresponding path program 6 times [2024-06-14 13:34:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653982124] [2024-06-14 13:34:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:41,506 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 13:34:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653982124] [2024-06-14 13:34:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653982124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113183428] [2024-06-14 13:34:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:41,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:41,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 305 transitions, 3450 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 13:34:41,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:41,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:43,951 INFO L124 PetriNetUnfolderBase]: 4714/7754 cut-off events. [2024-06-14 13:34:43,951 INFO L125 PetriNetUnfolderBase]: For 787337/787337 co-relation queries the response was YES. [2024-06-14 13:34:44,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48084 conditions, 7754 events. 4714/7754 cut-off events. For 787337/787337 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51514 event pairs, 1319 based on Foata normal form. 6/7752 useless extension candidates. Maximal degree in co-relation 47938. Up to 4971 conditions per place. [2024-06-14 13:34:44,049 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 123 changer transitions 0/356 dead transitions. [2024-06-14 13:34:44,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 356 transitions, 4610 flow [2024-06-14 13:34:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:34:44,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:34:44,050 INFO L175 Difference]: Start difference. First operand has 302 places, 305 transitions, 3450 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:34:44,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 356 transitions, 4610 flow [2024-06-14 13:34:46,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 356 transitions, 4317 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:46,914 INFO L231 Difference]: Finished difference. Result has 305 places, 306 transitions, 3437 flow [2024-06-14 13:34:46,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3437, PETRI_PLACES=305, PETRI_TRANSITIONS=306} [2024-06-14 13:34:46,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 13:34:46,914 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 306 transitions, 3437 flow [2024-06-14 13:34:46,914 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 13:34:46,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:46,915 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, 1] [2024-06-14 13:34:46,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:34:46,915 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 13:34:46,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -131605470, now seen corresponding path program 7 times [2024-06-14 13:34:46,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:46,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570125481] [2024-06-14 13:34:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:50,784 INFO 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 13:34:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:50,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570125481] [2024-06-14 13:34:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570125481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236334791] [2024-06-14 13:34:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:50,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:34:50,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 306 transitions, 3437 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 13:34:50,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:50,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:34:50,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:53,440 INFO L124 PetriNetUnfolderBase]: 4734/7798 cut-off events. [2024-06-14 13:34:53,440 INFO L125 PetriNetUnfolderBase]: For 797582/797582 co-relation queries the response was YES. [2024-06-14 13:34:53,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48131 conditions, 7798 events. 4734/7798 cut-off events. For 797582/797582 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 52177 event pairs, 1357 based on Foata normal form. 6/7796 useless extension candidates. Maximal degree in co-relation 47984. Up to 6368 conditions per place. [2024-06-14 13:34:53,523 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 226 selfloop transitions, 114 changer transitions 0/345 dead transitions. [2024-06-14 13:34:53,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 345 transitions, 4289 flow [2024-06-14 13:34:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:34:53,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:34:53,524 INFO L175 Difference]: Start difference. First operand has 305 places, 306 transitions, 3437 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:34:53,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 345 transitions, 4289 flow [2024-06-14 13:34:56,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 345 transitions, 4065 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:56,282 INFO L231 Difference]: Finished difference. Result has 308 places, 307 transitions, 3465 flow [2024-06-14 13:34:56,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3465, PETRI_PLACES=308, PETRI_TRANSITIONS=307} [2024-06-14 13:34:56,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-14 13:34:56,282 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 307 transitions, 3465 flow [2024-06-14 13:34:56,282 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 13:34:56,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:56,283 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, 1] [2024-06-14 13:34:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:34:56,283 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 13:34:56,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1311202192, now seen corresponding path program 8 times [2024-06-14 13:34:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:56,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370509367] [2024-06-14 13:34:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:00,039 INFO 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 13:35:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370509367] [2024-06-14 13:35:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370509367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:00,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725740122] [2024-06-14 13:35:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:00,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:00,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:00,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 307 transitions, 3465 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 13:35:00,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:00,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:00,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:02,687 INFO L124 PetriNetUnfolderBase]: 5140/8492 cut-off events. [2024-06-14 13:35:02,687 INFO L125 PetriNetUnfolderBase]: For 1239060/1239060 co-relation queries the response was YES. [2024-06-14 13:35:02,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58660 conditions, 8492 events. 5140/8492 cut-off events. For 1239060/1239060 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 57138 event pairs, 1494 based on Foata normal form. 6/8490 useless extension candidates. Maximal degree in co-relation 58512. Up to 4718 conditions per place. [2024-06-14 13:35:02,795 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 115 changer transitions 0/369 dead transitions. [2024-06-14 13:35:02,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 369 transitions, 4919 flow [2024-06-14 13:35:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 13:35:02,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-14 13:35:02,797 INFO L175 Difference]: Start difference. First operand has 308 places, 307 transitions, 3465 flow. Second operand 9 states and 184 transitions. [2024-06-14 13:35:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 369 transitions, 4919 flow [2024-06-14 13:35:05,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 369 transitions, 4685 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:05,981 INFO L231 Difference]: Finished difference. Result has 310 places, 308 transitions, 3493 flow [2024-06-14 13:35:05,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3493, PETRI_PLACES=310, PETRI_TRANSITIONS=308} [2024-06-14 13:35:05,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 13:35:05,982 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 308 transitions, 3493 flow [2024-06-14 13:35:05,982 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 13:35:05,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:05,982 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, 1] [2024-06-14 13:35:05,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:35:05,982 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 13:35:05,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1320725392, now seen corresponding path program 9 times [2024-06-14 13:35:05,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:05,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758145335] [2024-06-14 13:35:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:05,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:09,652 INFO 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 13:35:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758145335] [2024-06-14 13:35:09,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758145335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:09,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:09,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239041399] [2024-06-14 13:35:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:09,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:09,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:09,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:09,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 308 transitions, 3493 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 13:35:09,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:09,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:09,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:12,226 INFO L124 PetriNetUnfolderBase]: 5160/8528 cut-off events. [2024-06-14 13:35:12,226 INFO L125 PetriNetUnfolderBase]: For 1264664/1264664 co-relation queries the response was YES. [2024-06-14 13:35:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59245 conditions, 8528 events. 5160/8528 cut-off events. For 1264664/1264664 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 57480 event pairs, 1486 based on Foata normal form. 6/8526 useless extension candidates. Maximal degree in co-relation 59096. Up to 4730 conditions per place. [2024-06-14 13:35:12,329 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 245 selfloop transitions, 113 changer transitions 0/363 dead transitions. [2024-06-14 13:35:12,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 363 transitions, 4909 flow [2024-06-14 13:35:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 13:35:12,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 13:35:12,330 INFO L175 Difference]: Start difference. First operand has 310 places, 308 transitions, 3493 flow. Second operand 9 states and 177 transitions. [2024-06-14 13:35:12,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 363 transitions, 4909 flow [2024-06-14 13:35:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 363 transitions, 4391 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-14 13:35:15,430 INFO L231 Difference]: Finished difference. Result has 306 places, 309 transitions, 3235 flow [2024-06-14 13:35:15,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2990, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3235, PETRI_PLACES=306, PETRI_TRANSITIONS=309} [2024-06-14 13:35:15,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 13:35:15,430 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 309 transitions, 3235 flow [2024-06-14 13:35:15,430 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 13:35:15,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:15,430 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, 1] [2024-06-14 13:35:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:35:15,430 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 13:35:15,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -953530476, now seen corresponding path program 10 times [2024-06-14 13:35:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903397996] [2024-06-14 13:35:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:19,508 INFO 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 13:35:19,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:19,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903397996] [2024-06-14 13:35:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903397996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:19,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:19,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094056532] [2024-06-14 13:35:19,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:19,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:19,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:19,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 309 transitions, 3235 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 13:35:19,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:19,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:19,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:22,401 INFO L124 PetriNetUnfolderBase]: 5454/8994 cut-off events. [2024-06-14 13:35:22,401 INFO L125 PetriNetUnfolderBase]: For 1657697/1657697 co-relation queries the response was YES. [2024-06-14 13:35:22,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63455 conditions, 8994 events. 5454/8994 cut-off events. For 1657697/1657697 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 61088 event pairs, 1529 based on Foata normal form. 30/9016 useless extension candidates. Maximal degree in co-relation 63312. Up to 4879 conditions per place. [2024-06-14 13:35:22,506 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 243 selfloop transitions, 108 changer transitions 8/364 dead transitions. [2024-06-14 13:35:22,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 364 transitions, 4636 flow [2024-06-14 13:35:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 13:35:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 13:35:22,508 INFO L175 Difference]: Start difference. First operand has 306 places, 309 transitions, 3235 flow. Second operand 9 states and 177 transitions. [2024-06-14 13:35:22,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 364 transitions, 4636 flow [2024-06-14 13:35:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 364 transitions, 4419 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:27,746 INFO L231 Difference]: Finished difference. Result has 309 places, 308 transitions, 3244 flow [2024-06-14 13:35:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3244, PETRI_PLACES=309, PETRI_TRANSITIONS=308} [2024-06-14 13:35:27,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 13:35:27,747 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 308 transitions, 3244 flow [2024-06-14 13:35:27,747 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 13:35:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:27,747 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, 1] [2024-06-14 13:35:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:35:27,747 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 13:35:27,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:27,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1246360744, now seen corresponding path program 11 times [2024-06-14 13:35:27,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:27,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3766141] [2024-06-14 13:35:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:31,717 INFO 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 13:35:31,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3766141] [2024-06-14 13:35:31,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3766141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:31,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:31,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:31,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027253487] [2024-06-14 13:35:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:31,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:31,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:31,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:31,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 308 transitions, 3244 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 13:35:31,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:31,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:31,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:34,579 INFO L124 PetriNetUnfolderBase]: 5454/9018 cut-off events. [2024-06-14 13:35:34,579 INFO L125 PetriNetUnfolderBase]: For 1757306/1757306 co-relation queries the response was YES. [2024-06-14 13:35:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63894 conditions, 9018 events. 5454/9018 cut-off events. For 1757306/1757306 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61926 event pairs, 1713 based on Foata normal form. 42/9052 useless extension candidates. Maximal degree in co-relation 63750. Up to 7096 conditions per place. [2024-06-14 13:35:34,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 107 changer transitions 11/351 dead transitions. [2024-06-14 13:35:34,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 351 transitions, 4132 flow [2024-06-14 13:35:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:35:34,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:35:34,682 INFO L175 Difference]: Start difference. First operand has 309 places, 308 transitions, 3244 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:35:34,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 351 transitions, 4132 flow [2024-06-14 13:35:39,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 351 transitions, 3908 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:39,095 INFO L231 Difference]: Finished difference. Result has 311 places, 307 transitions, 3238 flow [2024-06-14 13:35:39,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3238, PETRI_PLACES=311, PETRI_TRANSITIONS=307} [2024-06-14 13:35:39,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:35:39,096 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 307 transitions, 3238 flow [2024-06-14 13:35:39,096 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 13:35:39,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:39,096 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, 1] [2024-06-14 13:35:39,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:35:39,096 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 13:35:39,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2043365416, now seen corresponding path program 12 times [2024-06-14 13:35:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057252078] [2024-06-14 13:35:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:43,003 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 13:35:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057252078] [2024-06-14 13:35:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057252078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:43,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:43,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468084842] [2024-06-14 13:35:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:43,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:43,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:43,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 307 transitions, 3238 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 13:35:43,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:43,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:43,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:45,659 INFO L124 PetriNetUnfolderBase]: 5082/8410 cut-off events. [2024-06-14 13:35:45,659 INFO L125 PetriNetUnfolderBase]: For 1569711/1569711 co-relation queries the response was YES. [2024-06-14 13:35:45,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58051 conditions, 8410 events. 5082/8410 cut-off events. For 1569711/1569711 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 57190 event pairs, 1517 based on Foata normal form. 42/8444 useless extension candidates. Maximal degree in co-relation 57906. Up to 5602 conditions per place. [2024-06-14 13:35:45,753 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 232 selfloop transitions, 104 changer transitions 14/355 dead transitions. [2024-06-14 13:35:45,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 355 transitions, 4386 flow [2024-06-14 13:35:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:35:45,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:35:45,755 INFO L175 Difference]: Start difference. First operand has 311 places, 307 transitions, 3238 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:35:45,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 355 transitions, 4386 flow [2024-06-14 13:35:49,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 355 transitions, 4158 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:49,354 INFO L231 Difference]: Finished difference. Result has 313 places, 304 transitions, 3210 flow [2024-06-14 13:35:49,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=313, PETRI_TRANSITIONS=304} [2024-06-14 13:35:49,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-14 13:35:49,355 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 304 transitions, 3210 flow [2024-06-14 13:35:49,355 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 13:35:49,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:49,355 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, 1] [2024-06-14 13:35:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:35:49,355 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 13:35:49,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1750023086, now seen corresponding path program 13 times [2024-06-14 13:35:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:49,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032598649] [2024-06-14 13:35:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:53,169 INFO 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 13:35:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:53,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032598649] [2024-06-14 13:35:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032598649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544726220] [2024-06-14 13:35:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:53,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:35:53,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 304 transitions, 3210 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 13:35:53,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:53,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:35:53,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:55,588 INFO L124 PetriNetUnfolderBase]: 4753/7841 cut-off events. [2024-06-14 13:35:55,588 INFO L125 PetriNetUnfolderBase]: For 1340545/1340545 co-relation queries the response was YES. [2024-06-14 13:35:55,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51528 conditions, 7841 events. 4753/7841 cut-off events. For 1340545/1340545 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 52734 event pairs, 1609 based on Foata normal form. 42/7875 useless extension candidates. Maximal degree in co-relation 51382. Up to 6527 conditions per place. [2024-06-14 13:35:55,687 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 62 changer transitions 10/345 dead transitions. [2024-06-14 13:35:55,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 345 transitions, 4058 flow [2024-06-14 13:35:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:35:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:35:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:35:55,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 13:35:55,689 INFO L175 Difference]: Start difference. First operand has 313 places, 304 transitions, 3210 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:35:55,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 345 transitions, 4058 flow [2024-06-14 13:36:00,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 345 transitions, 3830 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:00,549 INFO L231 Difference]: Finished difference. Result has 317 places, 303 transitions, 3095 flow [2024-06-14 13:36:00,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3095, PETRI_PLACES=317, PETRI_TRANSITIONS=303} [2024-06-14 13:36:00,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 13:36:00,549 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 303 transitions, 3095 flow [2024-06-14 13:36:00,549 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 13:36:00,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:00,549 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, 1] [2024-06-14 13:36:00,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:36:00,549 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 13:36:00,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 527714062, now seen corresponding path program 14 times [2024-06-14 13:36:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:00,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698348984] [2024-06-14 13:36:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:04,559 INFO 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 13:36:04,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698348984] [2024-06-14 13:36:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698348984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:04,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:04,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202772308] [2024-06-14 13:36:04,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:04,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:04,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 303 transitions, 3095 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 13:36:04,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:04,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:04,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:06,750 INFO L124 PetriNetUnfolderBase]: 4376/7236 cut-off events. [2024-06-14 13:36:06,751 INFO L125 PetriNetUnfolderBase]: For 827145/827145 co-relation queries the response was YES. [2024-06-14 13:36:06,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39597 conditions, 7236 events. 4376/7236 cut-off events. For 827145/827145 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 48065 event pairs, 1354 based on Foata normal form. 42/7270 useless extension candidates. Maximal degree in co-relation 39450. Up to 5944 conditions per place. [2024-06-14 13:36:06,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 54 changer transitions 12/339 dead transitions. [2024-06-14 13:36:06,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 339 transitions, 3921 flow [2024-06-14 13:36:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:36:06,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:36:06,836 INFO L175 Difference]: Start difference. First operand has 317 places, 303 transitions, 3095 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:36:06,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 339 transitions, 3921 flow [2024-06-14 13:36:09,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 339 transitions, 3732 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 13:36:09,361 INFO L231 Difference]: Finished difference. Result has 315 places, 300 transitions, 2987 flow [2024-06-14 13:36:09,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2987, PETRI_PLACES=315, PETRI_TRANSITIONS=300} [2024-06-14 13:36:09,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 13:36:09,362 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 300 transitions, 2987 flow [2024-06-14 13:36:09,362 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 13:36:09,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:09,362 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, 1] [2024-06-14 13:36:09,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:36:09,362 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 13:36:09,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1613740908, now seen corresponding path program 15 times [2024-06-14 13:36:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378535393] [2024-06-14 13:36:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:13,181 INFO 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 13:36:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378535393] [2024-06-14 13:36:13,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378535393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:13,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:13,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447092128] [2024-06-14 13:36:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:13,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:13,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 300 transitions, 2987 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 13:36:13,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:13,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:15,119 INFO L124 PetriNetUnfolderBase]: 4195/6933 cut-off events. [2024-06-14 13:36:15,119 INFO L125 PetriNetUnfolderBase]: For 852023/852023 co-relation queries the response was YES. [2024-06-14 13:36:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38396 conditions, 6933 events. 4195/6933 cut-off events. For 852023/852023 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45474 event pairs, 1239 based on Foata normal form. 42/6967 useless extension candidates. Maximal degree in co-relation 38248. Up to 4437 conditions per place. [2024-06-14 13:36:15,189 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 270 selfloop transitions, 51 changer transitions 15/341 dead transitions. [2024-06-14 13:36:15,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 341 transitions, 4075 flow [2024-06-14 13:36:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:36:15,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:36:15,191 INFO L175 Difference]: Start difference. First operand has 315 places, 300 transitions, 2987 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:36:15,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 341 transitions, 4075 flow [2024-06-14 13:36:17,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 341 transitions, 3910 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:36:17,349 INFO L231 Difference]: Finished difference. Result has 315 places, 295 transitions, 2879 flow [2024-06-14 13:36:17,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2879, PETRI_PLACES=315, PETRI_TRANSITIONS=295} [2024-06-14 13:36:17,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 13:36:17,350 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 295 transitions, 2879 flow [2024-06-14 13:36:17,350 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 13:36:17,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:17,350 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, 1, 1] [2024-06-14 13:36:17,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:36:17,351 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 13:36:17,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash -615793307, now seen corresponding path program 1 times [2024-06-14 13:36:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:17,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103466159] [2024-06-14 13:36:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:20,804 INFO 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 13:36:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103466159] [2024-06-14 13:36:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103466159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450824081] [2024-06-14 13:36:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:20,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:20,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:20,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:20,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 295 transitions, 2879 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 13:36:20,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:20,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:20,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:23,195 INFO L124 PetriNetUnfolderBase]: 4415/7283 cut-off events. [2024-06-14 13:36:23,195 INFO L125 PetriNetUnfolderBase]: For 1296882/1296882 co-relation queries the response was YES. [2024-06-14 13:36:23,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47669 conditions, 7283 events. 4415/7283 cut-off events. For 1296882/1296882 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47735 event pairs, 720 based on Foata normal form. 32/7307 useless extension candidates. Maximal degree in co-relation 47520. Up to 3533 conditions per place. [2024-06-14 13:36:23,274 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 107 changer transitions 22/353 dead transitions. [2024-06-14 13:36:23,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 353 transitions, 4283 flow [2024-06-14 13:36:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 13:36:23,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-14 13:36:23,275 INFO L175 Difference]: Start difference. First operand has 315 places, 295 transitions, 2879 flow. Second operand 9 states and 179 transitions. [2024-06-14 13:36:23,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 353 transitions, 4283 flow [2024-06-14 13:36:27,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 353 transitions, 4147 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:36:27,660 INFO L231 Difference]: Finished difference. Result has 315 places, 290 transitions, 2892 flow [2024-06-14 13:36:27,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=315, PETRI_TRANSITIONS=290} [2024-06-14 13:36:27,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 13:36:27,661 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 290 transitions, 2892 flow [2024-06-14 13:36:27,661 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 13:36:27,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:27,661 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, 1, 1] [2024-06-14 13:36:27,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:36:27,661 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 13:36:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -456678043, now seen corresponding path program 2 times [2024-06-14 13:36:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:27,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757165740] [2024-06-14 13:36:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:31,416 INFO 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 13:36:31,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757165740] [2024-06-14 13:36:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757165740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:31,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564011470] [2024-06-14 13:36:31,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:31,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:31,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:31,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:31,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 290 transitions, 2892 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 13:36:31,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:31,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:31,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:33,464 INFO L124 PetriNetUnfolderBase]: 4155/6829 cut-off events. [2024-06-14 13:36:33,465 INFO L125 PetriNetUnfolderBase]: For 1240522/1240522 co-relation queries the response was YES. [2024-06-14 13:36:33,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 6829 events. 4155/6829 cut-off events. For 1240522/1240522 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44107 event pairs, 1216 based on Foata normal form. 32/6853 useless extension candidates. Maximal degree in co-relation 44836. Up to 5669 conditions per place. [2024-06-14 13:36:33,544 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 287 selfloop transitions, 33 changer transitions 15/340 dead transitions. [2024-06-14 13:36:33,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 340 transitions, 4002 flow [2024-06-14 13:36:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:36:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:36:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:36:33,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:36:33,546 INFO L175 Difference]: Start difference. First operand has 315 places, 290 transitions, 2892 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:36:33,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 340 transitions, 4002 flow [2024-06-14 13:36:37,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 340 transitions, 3776 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:36:37,907 INFO L231 Difference]: Finished difference. Result has 311 places, 288 transitions, 2728 flow [2024-06-14 13:36:37,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2728, PETRI_PLACES=311, PETRI_TRANSITIONS=288} [2024-06-14 13:36:37,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:36:37,907 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 288 transitions, 2728 flow [2024-06-14 13:36:37,907 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 13:36:37,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:37,908 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, 1, 1] [2024-06-14 13:36:37,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:36:37,908 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 13:36:37,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 387167741, now seen corresponding path program 3 times [2024-06-14 13:36:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:37,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264585952] [2024-06-14 13:36:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:37,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:41,587 INFO 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 13:36:41,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264585952] [2024-06-14 13:36:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264585952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:41,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:41,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:41,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843395759] [2024-06-14 13:36:41,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:41,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:41,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:41,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 288 transitions, 2728 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 13:36:41,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:41,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:41,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:43,186 INFO L124 PetriNetUnfolderBase]: 3571/5905 cut-off events. [2024-06-14 13:36:43,186 INFO L125 PetriNetUnfolderBase]: For 508291/508291 co-relation queries the response was YES. [2024-06-14 13:36:43,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28976 conditions, 5905 events. 3571/5905 cut-off events. For 508291/508291 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37748 event pairs, 916 based on Foata normal form. 32/5929 useless extension candidates. Maximal degree in co-relation 28828. Up to 5049 conditions per place. [2024-06-14 13:36:43,251 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 263 selfloop transitions, 27 changer transitions 29/324 dead transitions. [2024-06-14 13:36:43,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 324 transitions, 3520 flow [2024-06-14 13:36:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:36:43,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:36:43,252 INFO L175 Difference]: Start difference. First operand has 311 places, 288 transitions, 2728 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:36:43,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 324 transitions, 3520 flow [2024-06-14 13:36:44,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 324 transitions, 3451 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:44,980 INFO L231 Difference]: Finished difference. Result has 308 places, 282 transitions, 2647 flow [2024-06-14 13:36:44,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2647, PETRI_PLACES=308, PETRI_TRANSITIONS=282} [2024-06-14 13:36:44,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-14 13:36:44,980 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 282 transitions, 2647 flow [2024-06-14 13:36:44,981 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 13:36:44,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:44,981 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, 1, 1] [2024-06-14 13:36:44,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:36:44,981 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 13:36:44,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 416758509, now seen corresponding path program 4 times [2024-06-14 13:36:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:44,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823802937] [2024-06-14 13:36:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:48,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:48,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823802937] [2024-06-14 13:36:48,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823802937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:48,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:48,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815949046] [2024-06-14 13:36:48,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:48,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:48,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 282 transitions, 2647 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 13:36:48,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:48,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:48,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:50,701 INFO L124 PetriNetUnfolderBase]: 3759/6201 cut-off events. [2024-06-14 13:36:50,701 INFO L125 PetriNetUnfolderBase]: For 825109/825109 co-relation queries the response was YES. [2024-06-14 13:36:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34731 conditions, 6201 events. 3759/6201 cut-off events. For 825109/825109 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39756 event pairs, 762 based on Foata normal form. 40/6235 useless extension candidates. Maximal degree in co-relation 34584. Up to 3793 conditions per place. [2024-06-14 13:36:50,771 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 212 selfloop transitions, 93 changer transitions 15/325 dead transitions. [2024-06-14 13:36:50,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 325 transitions, 3721 flow [2024-06-14 13:36:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:36:50,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:36:50,772 INFO L175 Difference]: Start difference. First operand has 308 places, 282 transitions, 2647 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:36:50,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 325 transitions, 3721 flow [2024-06-14 13:36:53,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 325 transitions, 3648 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:36:53,116 INFO L231 Difference]: Finished difference. Result has 300 places, 275 transitions, 2691 flow [2024-06-14 13:36:53,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2691, PETRI_PLACES=300, PETRI_TRANSITIONS=275} [2024-06-14 13:36:53,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 13:36:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 275 transitions, 2691 flow [2024-06-14 13:36:53,117 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 13:36:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:53,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:36:53,117 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 13:36:53,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1953996417, now seen corresponding path program 5 times [2024-06-14 13:36:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669669811] [2024-06-14 13:36:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:56,474 INFO 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 13:36:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:56,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669669811] [2024-06-14 13:36:56,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669669811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:56,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:56,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:56,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652070618] [2024-06-14 13:36:56,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:56,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:56,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:36:56,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 275 transitions, 2691 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 13:36:56,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:56,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:36:56,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:58,319 INFO L124 PetriNetUnfolderBase]: 3501/5789 cut-off events. [2024-06-14 13:36:58,319 INFO L125 PetriNetUnfolderBase]: For 781170/781170 co-relation queries the response was YES. [2024-06-14 13:36:58,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32473 conditions, 5789 events. 3501/5789 cut-off events. For 781170/781170 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36816 event pairs, 992 based on Foata normal form. 44/5827 useless extension candidates. Maximal degree in co-relation 32330. Up to 4721 conditions per place. [2024-06-14 13:36:58,385 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 74 changer transitions 6/303 dead transitions. [2024-06-14 13:36:58,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 303 transitions, 3397 flow [2024-06-14 13:36:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:36:58,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:36:58,386 INFO L175 Difference]: Start difference. First operand has 300 places, 275 transitions, 2691 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:36:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 303 transitions, 3397 flow [2024-06-14 13:37:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 303 transitions, 3190 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:37:00,698 INFO L231 Difference]: Finished difference. Result has 294 places, 271 transitions, 2612 flow [2024-06-14 13:37:00,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2612, PETRI_PLACES=294, PETRI_TRANSITIONS=271} [2024-06-14 13:37:00,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:37:00,699 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 271 transitions, 2612 flow [2024-06-14 13:37:00,699 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 13:37:00,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:00,699 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, 1, 1] [2024-06-14 13:37:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:37:00,699 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 13:37:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:00,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2085585165, now seen corresponding path program 6 times [2024-06-14 13:37:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174964451] [2024-06-14 13:37:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174964451] [2024-06-14 13:37:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174964451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:04,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:04,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765927799] [2024-06-14 13:37:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:04,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:04,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 271 transitions, 2612 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 13:37:04,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:04,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:04,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:05,795 INFO L124 PetriNetUnfolderBase]: 3255/5397 cut-off events. [2024-06-14 13:37:05,795 INFO L125 PetriNetUnfolderBase]: For 499498/499498 co-relation queries the response was YES. [2024-06-14 13:37:05,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26478 conditions, 5397 events. 3255/5397 cut-off events. For 499498/499498 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34116 event pairs, 794 based on Foata normal form. 40/5431 useless extension candidates. Maximal degree in co-relation 26338. Up to 4251 conditions per place. [2024-06-14 13:37:05,856 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 71 changer transitions 14/306 dead transitions. [2024-06-14 13:37:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 306 transitions, 3372 flow [2024-06-14 13:37:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:37:05,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:37:05,857 INFO L175 Difference]: Start difference. First operand has 294 places, 271 transitions, 2612 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:37:05,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 306 transitions, 3372 flow [2024-06-14 13:37:07,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 306 transitions, 3210 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 13:37:07,902 INFO L231 Difference]: Finished difference. Result has 293 places, 263 transitions, 2537 flow [2024-06-14 13:37:07,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2537, PETRI_PLACES=293, PETRI_TRANSITIONS=263} [2024-06-14 13:37:07,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:37:07,903 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 263 transitions, 2537 flow [2024-06-14 13:37:07,903 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 13:37:07,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:07,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:07,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:37:07,903 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 13:37:07,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2124612285, now seen corresponding path program 7 times [2024-06-14 13:37:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614814646] [2024-06-14 13:37:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:11,372 INFO 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 13:37:11,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:11,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614814646] [2024-06-14 13:37:11,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614814646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:11,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:11,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:11,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570157507] [2024-06-14 13:37:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:11,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:11,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:11,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 263 transitions, 2537 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 13:37:11,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:11,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:12,982 INFO L124 PetriNetUnfolderBase]: 3317/5457 cut-off events. [2024-06-14 13:37:12,982 INFO L125 PetriNetUnfolderBase]: For 636978/636978 co-relation queries the response was YES. [2024-06-14 13:37:13,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29936 conditions, 5457 events. 3317/5457 cut-off events. For 636978/636978 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33957 event pairs, 898 based on Foata normal form. 32/5483 useless extension candidates. Maximal degree in co-relation 29796. Up to 3701 conditions per place. [2024-06-14 13:37:13,043 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 227 selfloop transitions, 55 changer transitions 12/299 dead transitions. [2024-06-14 13:37:13,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 299 transitions, 3489 flow [2024-06-14 13:37:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:37:13,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:37:13,044 INFO L175 Difference]: Start difference. First operand has 293 places, 263 transitions, 2537 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:37:13,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 299 transitions, 3489 flow [2024-06-14 13:37:15,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 299 transitions, 3330 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:37:15,010 INFO L231 Difference]: Finished difference. Result has 288 places, 259 transitions, 2462 flow [2024-06-14 13:37:15,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2462, PETRI_PLACES=288, PETRI_TRANSITIONS=259} [2024-06-14 13:37:15,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 13:37:15,010 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 259 transitions, 2462 flow [2024-06-14 13:37:15,010 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 13:37:15,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:15,010 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, 1, 1] [2024-06-14 13:37:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:37:15,011 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 13:37:15,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1125631161, now seen corresponding path program 8 times [2024-06-14 13:37:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089418026] [2024-06-14 13:37:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:18,610 INFO 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 13:37:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089418026] [2024-06-14 13:37:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089418026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:18,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:18,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803524755] [2024-06-14 13:37:18,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:18,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:18,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:18,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:18,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:18,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 259 transitions, 2462 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 13:37:18,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:18,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:20,075 INFO L124 PetriNetUnfolderBase]: 3117/5145 cut-off events. [2024-06-14 13:37:20,075 INFO L125 PetriNetUnfolderBase]: For 446693/446693 co-relation queries the response was YES. [2024-06-14 13:37:20,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25417 conditions, 5145 events. 3117/5145 cut-off events. For 446693/446693 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31842 event pairs, 754 based on Foata normal form. 32/5171 useless extension candidates. Maximal degree in co-relation 25279. Up to 3701 conditions per place. [2024-06-14 13:37:20,131 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 213 selfloop transitions, 46 changer transitions 30/294 dead transitions. [2024-06-14 13:37:20,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 294 transitions, 3186 flow [2024-06-14 13:37:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:37:20,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:37:20,133 INFO L175 Difference]: Start difference. First operand has 288 places, 259 transitions, 2462 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:37:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 294 transitions, 3186 flow [2024-06-14 13:37:21,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 294 transitions, 3072 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:37:21,833 INFO L231 Difference]: Finished difference. Result has 286 places, 241 transitions, 2241 flow [2024-06-14 13:37:21,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=286, PETRI_TRANSITIONS=241} [2024-06-14 13:37:21,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:37:21,833 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 241 transitions, 2241 flow [2024-06-14 13:37:21,833 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 13:37:21,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:21,834 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, 1, 1] [2024-06-14 13:37:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:37:21,834 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 13:37:21,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -900185593, now seen corresponding path program 9 times [2024-06-14 13:37:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928064321] [2024-06-14 13:37:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:25,703 INFO 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 13:37:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:25,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928064321] [2024-06-14 13:37:25,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928064321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:25,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:25,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378349295] [2024-06-14 13:37:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:25,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:25,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:25,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 241 transitions, 2241 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 13:37:25,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:25,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:25,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:27,722 INFO L124 PetriNetUnfolderBase]: 3068/5083 cut-off events. [2024-06-14 13:37:27,722 INFO L125 PetriNetUnfolderBase]: For 677939/677939 co-relation queries the response was YES. [2024-06-14 13:37:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28533 conditions, 5083 events. 3068/5083 cut-off events. For 677939/677939 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31629 event pairs, 755 based on Foata normal form. 40/5114 useless extension candidates. Maximal degree in co-relation 28396. Up to 2319 conditions per place. [2024-06-14 13:37:27,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 88 changer transitions 27/291 dead transitions. [2024-06-14 13:37:27,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 291 transitions, 3247 flow [2024-06-14 13:37:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:37:27,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:37:27,770 INFO L175 Difference]: Start difference. First operand has 286 places, 241 transitions, 2241 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:37:27,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 291 transitions, 3247 flow [2024-06-14 13:37:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 291 transitions, 3102 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-06-14 13:37:28,919 INFO L231 Difference]: Finished difference. Result has 267 places, 233 transitions, 2208 flow [2024-06-14 13:37:28,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2208, PETRI_PLACES=267, PETRI_TRANSITIONS=233} [2024-06-14 13:37:28,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 13:37:28,919 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 233 transitions, 2208 flow [2024-06-14 13:37:28,919 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 13:37:28,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:28,919 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, 1, 1] [2024-06-14 13:37:28,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:37:28,920 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 13:37:28,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1682586053, now seen corresponding path program 1 times [2024-06-14 13:37:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:28,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457286521] [2024-06-14 13:37:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:28,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:32,939 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 13:37:32,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457286521] [2024-06-14 13:37:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457286521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:32,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80274124] [2024-06-14 13:37:32,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:32,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:32,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 233 transitions, 2208 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:34,765 INFO L124 PetriNetUnfolderBase]: 2800/4663 cut-off events. [2024-06-14 13:37:34,766 INFO L125 PetriNetUnfolderBase]: For 647835/647835 co-relation queries the response was YES. [2024-06-14 13:37:34,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26357 conditions, 4663 events. 2800/4663 cut-off events. For 647835/647835 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28771 event pairs, 801 based on Foata normal form. 44/4698 useless extension candidates. Maximal degree in co-relation 26227. Up to 3475 conditions per place. [2024-06-14 13:37:34,809 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 87 changer transitions 17/268 dead transitions. [2024-06-14 13:37:34,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 268 transitions, 2854 flow [2024-06-14 13:37:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:37:34,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:37:34,811 INFO L175 Difference]: Start difference. First operand has 267 places, 233 transitions, 2208 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:37:34,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 268 transitions, 2854 flow [2024-06-14 13:37:36,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 268 transitions, 2662 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-14 13:37:36,223 INFO L231 Difference]: Finished difference. Result has 259 places, 228 transitions, 2164 flow [2024-06-14 13:37:36,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2164, PETRI_PLACES=259, PETRI_TRANSITIONS=228} [2024-06-14 13:37:36,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 13:37:36,223 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 228 transitions, 2164 flow [2024-06-14 13:37:36,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:36,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:36,223 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, 1, 1] [2024-06-14 13:37:36,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:37:36,224 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 13:37:36,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 667622497, now seen corresponding path program 2 times [2024-06-14 13:37:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:36,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746692410] [2024-06-14 13:37:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:40,158 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 13:37:40,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:40,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746692410] [2024-06-14 13:37:40,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746692410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:40,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:40,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:40,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167125440] [2024-06-14 13:37:40,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:40,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:40,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:40,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:40,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:40,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 228 transitions, 2164 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:40,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:40,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:40,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:41,733 INFO L124 PetriNetUnfolderBase]: 2756/4603 cut-off events. [2024-06-14 13:37:41,733 INFO L125 PetriNetUnfolderBase]: For 577655/577655 co-relation queries the response was YES. [2024-06-14 13:37:41,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4603 events. 2756/4603 cut-off events. For 577655/577655 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28379 event pairs, 719 based on Foata normal form. 40/4634 useless extension candidates. Maximal degree in co-relation 25385. Up to 3351 conditions per place. [2024-06-14 13:37:41,779 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 76 changer transitions 34/266 dead transitions. [2024-06-14 13:37:41,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 266 transitions, 2836 flow [2024-06-14 13:37:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:37:41,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:37:41,780 INFO L175 Difference]: Start difference. First operand has 259 places, 228 transitions, 2164 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:37:41,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 266 transitions, 2836 flow [2024-06-14 13:37:43,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 266 transitions, 2658 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:37:43,098 INFO L231 Difference]: Finished difference. Result has 257 places, 215 transitions, 2024 flow [2024-06-14 13:37:43,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2024, PETRI_PLACES=257, PETRI_TRANSITIONS=215} [2024-06-14 13:37:43,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 13:37:43,098 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 215 transitions, 2024 flow [2024-06-14 13:37:43,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:43,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:43,099 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, 1, 1] [2024-06-14 13:37:43,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:37:43,099 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 13:37:43,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 45136841, now seen corresponding path program 3 times [2024-06-14 13:37:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094031463] [2024-06-14 13:37:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:46,964 INFO 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 13:37:46,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094031463] [2024-06-14 13:37:46,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094031463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:46,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:46,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:46,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23614879] [2024-06-14 13:37:46,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:46,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:46,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 215 transitions, 2024 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:48,552 INFO L124 PetriNetUnfolderBase]: 2662/4491 cut-off events. [2024-06-14 13:37:48,552 INFO L125 PetriNetUnfolderBase]: For 599585/599585 co-relation queries the response was YES. [2024-06-14 13:37:48,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26949 conditions, 4491 events. 2662/4491 cut-off events. For 599585/599585 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27856 event pairs, 549 based on Foata normal form. 24/4512 useless extension candidates. Maximal degree in co-relation 26825. Up to 1624 conditions per place. [2024-06-14 13:37:48,599 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 152 selfloop transitions, 81 changer transitions 24/262 dead transitions. [2024-06-14 13:37:48,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 262 transitions, 3120 flow [2024-06-14 13:37:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:37:48,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:37:48,600 INFO L175 Difference]: Start difference. First operand has 257 places, 215 transitions, 2024 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:37:48,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 262 transitions, 3120 flow [2024-06-14 13:37:49,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 262 transitions, 2926 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-14 13:37:49,643 INFO L231 Difference]: Finished difference. Result has 245 places, 206 transitions, 1941 flow [2024-06-14 13:37:49,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1941, PETRI_PLACES=245, PETRI_TRANSITIONS=206} [2024-06-14 13:37:49,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:37:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 206 transitions, 1941 flow [2024-06-14 13:37:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:49,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:49,644 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, 1, 1] [2024-06-14 13:37:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:37:49,645 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 13:37:49,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash 340356041, now seen corresponding path program 4 times [2024-06-14 13:37:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3389301] [2024-06-14 13:37:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:53,302 INFO 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 13:37:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:53,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3389301] [2024-06-14 13:37:53,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3389301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:53,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:53,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:53,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791644108] [2024-06-14 13:37:53,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:53,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:53,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:37:53,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 206 transitions, 1941 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:53,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:53,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:37:53,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:55,061 INFO L124 PetriNetUnfolderBase]: 2536/4269 cut-off events. [2024-06-14 13:37:55,061 INFO L125 PetriNetUnfolderBase]: For 623755/623755 co-relation queries the response was YES. [2024-06-14 13:37:55,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27631 conditions, 4269 events. 2536/4269 cut-off events. For 623755/623755 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26138 event pairs, 725 based on Foata normal form. 24/4288 useless extension candidates. Maximal degree in co-relation 27513. Up to 2352 conditions per place. [2024-06-14 13:37:55,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 160 selfloop transitions, 68 changer transitions 15/248 dead transitions. [2024-06-14 13:37:55,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 248 transitions, 2951 flow [2024-06-14 13:37:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:37:55,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:37:55,107 INFO L175 Difference]: Start difference. First operand has 245 places, 206 transitions, 1941 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:37:55,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 248 transitions, 2951 flow [2024-06-14 13:37:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 248 transitions, 2722 flow, removed 36 selfloop flow, removed 14 redundant places. [2024-06-14 13:37:55,939 INFO L231 Difference]: Finished difference. Result has 232 places, 198 transitions, 1834 flow [2024-06-14 13:37:55,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1834, PETRI_PLACES=232, PETRI_TRANSITIONS=198} [2024-06-14 13:37:55,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 13:37:55,940 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 198 transitions, 1834 flow [2024-06-14 13:37:55,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:55,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:55,940 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, 1, 1] [2024-06-14 13:37:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:37:55,940 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 13:37:55,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -453102405, now seen corresponding path program 5 times [2024-06-14 13:37:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166477537] [2024-06-14 13:37:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:00,509 INFO 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 13:38:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:00,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166477537] [2024-06-14 13:38:00,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166477537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:00,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:00,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:00,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572286917] [2024-06-14 13:38:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:00,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:00,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:00,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:00,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 198 transitions, 1834 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:00,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:00,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:00,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:02,071 INFO L124 PetriNetUnfolderBase]: 2326/3923 cut-off events. [2024-06-14 13:38:02,071 INFO L125 PetriNetUnfolderBase]: For 447191/447191 co-relation queries the response was YES. [2024-06-14 13:38:02,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22819 conditions, 3923 events. 2326/3923 cut-off events. For 447191/447191 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23643 event pairs, 709 based on Foata normal form. 24/3942 useless extension candidates. Maximal degree in co-relation 22709. Up to 2352 conditions per place. [2024-06-14 13:38:02,109 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 57 changer transitions 35/234 dead transitions. [2024-06-14 13:38:02,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 234 transitions, 2580 flow [2024-06-14 13:38:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:38:02,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:38:02,110 INFO L175 Difference]: Start difference. First operand has 232 places, 198 transitions, 1834 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:38:02,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 234 transitions, 2580 flow [2024-06-14 13:38:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 234 transitions, 2425 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-14 13:38:02,556 INFO L231 Difference]: Finished difference. Result has 225 places, 181 transitions, 1677 flow [2024-06-14 13:38:02,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1677, PETRI_PLACES=225, PETRI_TRANSITIONS=181} [2024-06-14 13:38:02,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 13:38:02,556 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 181 transitions, 1677 flow [2024-06-14 13:38:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:02,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:02,556 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, 1, 1] [2024-06-14 13:38:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:38:02,556 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 13:38:02,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 409116533, now seen corresponding path program 6 times [2024-06-14 13:38:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546666845] [2024-06-14 13:38:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:06,665 INFO 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 13:38:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546666845] [2024-06-14 13:38:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546666845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:06,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:06,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:06,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129362200] [2024-06-14 13:38:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:06,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:06,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:06,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:06,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 181 transitions, 1677 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:06,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:06,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:06,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:08,286 INFO L124 PetriNetUnfolderBase]: 2274/3801 cut-off events. [2024-06-14 13:38:08,286 INFO L125 PetriNetUnfolderBase]: For 469119/469119 co-relation queries the response was YES. [2024-06-14 13:38:08,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21917 conditions, 3801 events. 2274/3801 cut-off events. For 469119/469119 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22604 event pairs, 707 based on Foata normal form. 44/3838 useless extension candidates. Maximal degree in co-relation 21811. Up to 2785 conditions per place. [2024-06-14 13:38:08,321 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 120 selfloop transitions, 67 changer transitions 16/208 dead transitions. [2024-06-14 13:38:08,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 208 transitions, 2169 flow [2024-06-14 13:38:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:38:08,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 13:38:08,322 INFO L175 Difference]: Start difference. First operand has 225 places, 181 transitions, 1677 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:38:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 208 transitions, 2169 flow [2024-06-14 13:38:08,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 2078 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-06-14 13:38:08,807 INFO L231 Difference]: Finished difference. Result has 205 places, 177 transitions, 1693 flow [2024-06-14 13:38:08,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1693, PETRI_PLACES=205, PETRI_TRANSITIONS=177} [2024-06-14 13:38:08,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 13:38:08,807 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 177 transitions, 1693 flow [2024-06-14 13:38:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:08,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:08,807 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, 1, 1, 1] [2024-06-14 13:38:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:38:08,807 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 13:38:08,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 409353683, now seen corresponding path program 7 times [2024-06-14 13:38:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204045685] [2024-06-14 13:38:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:12,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204045685] [2024-06-14 13:38:12,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204045685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:12,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:12,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:12,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767565345] [2024-06-14 13:38:12,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:12,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:12,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:12,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:12,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:12,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 177 transitions, 1693 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:12,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:12,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:12,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:14,346 INFO L124 PetriNetUnfolderBase]: 2446/4097 cut-off events. [2024-06-14 13:38:14,346 INFO L125 PetriNetUnfolderBase]: For 444925/444925 co-relation queries the response was YES. [2024-06-14 13:38:14,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24935 conditions, 4097 events. 2446/4097 cut-off events. For 444925/444925 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24830 event pairs, 821 based on Foata normal form. 36/4126 useless extension candidates. Maximal degree in co-relation 24839. Up to 2693 conditions per place. [2024-06-14 13:38:14,377 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 59 changer transitions 18/211 dead transitions. [2024-06-14 13:38:14,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 211 transitions, 2367 flow [2024-06-14 13:38:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:38:14,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:38:14,378 INFO L175 Difference]: Start difference. First operand has 205 places, 177 transitions, 1693 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:38:14,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 211 transitions, 2367 flow [2024-06-14 13:38:14,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 211 transitions, 2225 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:14,861 INFO L231 Difference]: Finished difference. Result has 203 places, 168 transitions, 1602 flow [2024-06-14 13:38:14,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1602, PETRI_PLACES=203, PETRI_TRANSITIONS=168} [2024-06-14 13:38:14,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 13:38:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 168 transitions, 1602 flow [2024-06-14 13:38:14,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:14,861 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, 1, 1] [2024-06-14 13:38:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:38:14,862 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 13:38:14,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2101225993, now seen corresponding path program 8 times [2024-06-14 13:38:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350284460] [2024-06-14 13:38:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:19,193 INFO 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 13:38:19,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350284460] [2024-06-14 13:38:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350284460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:19,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:19,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106674706] [2024-06-14 13:38:19,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:19,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:19,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:19,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:19,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 168 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:19,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:19,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:19,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:20,721 INFO L124 PetriNetUnfolderBase]: 2166/3645 cut-off events. [2024-06-14 13:38:20,721 INFO L125 PetriNetUnfolderBase]: For 349597/349597 co-relation queries the response was YES. [2024-06-14 13:38:20,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20326 conditions, 3645 events. 2166/3645 cut-off events. For 349597/349597 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21770 event pairs, 759 based on Foata normal form. 44/3682 useless extension candidates. Maximal degree in co-relation 20231. Up to 2693 conditions per place. [2024-06-14 13:38:20,749 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 112 selfloop transitions, 59 changer transitions 18/194 dead transitions. [2024-06-14 13:38:20,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 194 transitions, 2064 flow [2024-06-14 13:38:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:38:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 13:38:20,750 INFO L175 Difference]: Start difference. First operand has 203 places, 168 transitions, 1602 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:38:20,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 194 transitions, 2064 flow [2024-06-14 13:38:21,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 194 transitions, 1943 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:38:21,045 INFO L231 Difference]: Finished difference. Result has 200 places, 162 transitions, 1559 flow [2024-06-14 13:38:21,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1559, PETRI_PLACES=200, PETRI_TRANSITIONS=162} [2024-06-14 13:38:21,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 13:38:21,046 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 162 transitions, 1559 flow [2024-06-14 13:38:21,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:21,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:21,046 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, 1, 1] [2024-06-14 13:38:21,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:38:21,046 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 13:38:21,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2133870341, now seen corresponding path program 9 times [2024-06-14 13:38:21,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763526281] [2024-06-14 13:38:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:25,031 INFO 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 13:38:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763526281] [2024-06-14 13:38:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763526281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:25,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245517442] [2024-06-14 13:38:25,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:25,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:25,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:25,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:25,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 162 transitions, 1559 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:25,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:25,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:25,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:26,410 INFO L124 PetriNetUnfolderBase]: 2118/3581 cut-off events. [2024-06-14 13:38:26,410 INFO L125 PetriNetUnfolderBase]: For 320367/320367 co-relation queries the response was YES. [2024-06-14 13:38:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19844 conditions, 3581 events. 2118/3581 cut-off events. For 320367/320367 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21401 event pairs, 677 based on Foata normal form. 40/3614 useless extension candidates. Maximal degree in co-relation 19751. Up to 2507 conditions per place. [2024-06-14 13:38:26,440 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 107 selfloop transitions, 47 changer transitions 32/191 dead transitions. [2024-06-14 13:38:26,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 191 transitions, 2039 flow [2024-06-14 13:38:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:38:26,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 13:38:26,441 INFO L175 Difference]: Start difference. First operand has 200 places, 162 transitions, 1559 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:38:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 191 transitions, 2039 flow [2024-06-14 13:38:26,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 191 transitions, 1917 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:26,747 INFO L231 Difference]: Finished difference. Result has 197 places, 147 transitions, 1390 flow [2024-06-14 13:38:26,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1390, PETRI_PLACES=197, PETRI_TRANSITIONS=147} [2024-06-14 13:38:26,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 13:38:26,747 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 147 transitions, 1390 flow [2024-06-14 13:38:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:26,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:26,748 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, 1, 1] [2024-06-14 13:38:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:38:26,748 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 13:38:26,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2141578181, now seen corresponding path program 10 times [2024-06-14 13:38:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379595261] [2024-06-14 13:38:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:30,532 INFO 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 13:38:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379595261] [2024-06-14 13:38:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379595261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:30,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:30,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2982358] [2024-06-14 13:38:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:30,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:30,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:30,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 147 transitions, 1390 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:30,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:30,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:31,835 INFO L124 PetriNetUnfolderBase]: 2026/3457 cut-off events. [2024-06-14 13:38:31,835 INFO L125 PetriNetUnfolderBase]: For 326341/326341 co-relation queries the response was YES. [2024-06-14 13:38:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20501 conditions, 3457 events. 2026/3457 cut-off events. For 326341/326341 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20808 event pairs, 657 based on Foata normal form. 24/3472 useless extension candidates. Maximal degree in co-relation 20409. Up to 2265 conditions per place. [2024-06-14 13:38:31,865 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 110 selfloop transitions, 51 changer transitions 12/178 dead transitions. [2024-06-14 13:38:31,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 178 transitions, 1972 flow [2024-06-14 13:38:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:38:31,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:38:31,866 INFO L175 Difference]: Start difference. First operand has 197 places, 147 transitions, 1390 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:38:31,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 178 transitions, 1972 flow [2024-06-14 13:38:32,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 178 transitions, 1850 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-14 13:38:32,319 INFO L231 Difference]: Finished difference. Result has 185 places, 142 transitions, 1354 flow [2024-06-14 13:38:32,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1354, PETRI_PLACES=185, PETRI_TRANSITIONS=142} [2024-06-14 13:38:32,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 13:38:32,320 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 142 transitions, 1354 flow [2024-06-14 13:38:32,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:32,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:32,320 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, 1, 1] [2024-06-14 13:38:32,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:38:32,320 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 13:38:32,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:32,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2141221991, now seen corresponding path program 11 times [2024-06-14 13:38:32,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:32,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649013631] [2024-06-14 13:38:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:32,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:36,459 INFO 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 13:38:36,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:36,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649013631] [2024-06-14 13:38:36,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649013631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:36,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:36,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076099755] [2024-06-14 13:38:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:36,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:36,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:36,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 142 transitions, 1354 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:36,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:36,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:36,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:37,929 INFO L124 PetriNetUnfolderBase]: 1868/3197 cut-off events. [2024-06-14 13:38:37,929 INFO L125 PetriNetUnfolderBase]: For 228733/228733 co-relation queries the response was YES. [2024-06-14 13:38:37,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17595 conditions, 3197 events. 1868/3197 cut-off events. For 228733/228733 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18963 event pairs, 615 based on Foata normal form. 24/3214 useless extension candidates. Maximal degree in co-relation 17509. Up to 2265 conditions per place. [2024-06-14 13:38:37,952 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 33 changer transitions 45/167 dead transitions. [2024-06-14 13:38:37,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 167 transitions, 1758 flow [2024-06-14 13:38:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:38:37,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:38:37,953 INFO L175 Difference]: Start difference. First operand has 185 places, 142 transitions, 1354 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:38:37,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 167 transitions, 1758 flow [2024-06-14 13:38:38,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 167 transitions, 1656 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:38,312 INFO L231 Difference]: Finished difference. Result has 184 places, 117 transitions, 1097 flow [2024-06-14 13:38:38,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1097, PETRI_PLACES=184, PETRI_TRANSITIONS=117} [2024-06-14 13:38:38,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 13:38:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 117 transitions, 1097 flow [2024-06-14 13:38:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:38,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:38,313 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, 1, 1, 1] [2024-06-14 13:38:38,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:38:38,313 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 13:38:38,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1893404479, now seen corresponding path program 12 times [2024-06-14 13:38:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230755110] [2024-06-14 13:38:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:42,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230755110] [2024-06-14 13:38:42,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230755110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:42,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:42,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:42,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511811665] [2024-06-14 13:38:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:42,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:42,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:42,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:42,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 117 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:42,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:42,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:42,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:43,424 INFO L124 PetriNetUnfolderBase]: 1948/3255 cut-off events. [2024-06-14 13:38:43,424 INFO L125 PetriNetUnfolderBase]: For 314446/314446 co-relation queries the response was YES. [2024-06-14 13:38:43,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19950 conditions, 3255 events. 1948/3255 cut-off events. For 314446/314446 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19261 event pairs, 677 based on Foata normal form. 36/3280 useless extension candidates. Maximal degree in co-relation 19865. Up to 2121 conditions per place. [2024-06-14 13:38:43,450 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 45 changer transitions 13/150 dead transitions. [2024-06-14 13:38:43,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 150 transitions, 1617 flow [2024-06-14 13:38:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:38:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:38:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-14 13:38:43,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36152219873150104 [2024-06-14 13:38:43,451 INFO L175 Difference]: Start difference. First operand has 184 places, 117 transitions, 1097 flow. Second operand 11 states and 171 transitions. [2024-06-14 13:38:43,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 150 transitions, 1617 flow [2024-06-14 13:38:43,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 150 transitions, 1483 flow, removed 32 selfloop flow, removed 21 redundant places. [2024-06-14 13:38:43,651 INFO L231 Difference]: Finished difference. Result has 152 places, 114 transitions, 1049 flow [2024-06-14 13:38:43,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1049, PETRI_PLACES=152, PETRI_TRANSITIONS=114} [2024-06-14 13:38:43,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 13:38:43,651 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 114 transitions, 1049 flow [2024-06-14 13:38:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:43,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:43,652 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, 1, 1] [2024-06-14 13:38:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:38:43,652 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 13:38:43,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1284777633, now seen corresponding path program 1 times [2024-06-14 13:38:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:43,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048405877] [2024-06-14 13:38:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:47,499 INFO 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 13:38:47,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:47,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048405877] [2024-06-14 13:38:47,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048405877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:47,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:47,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:47,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765710281] [2024-06-14 13:38:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:47,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:47,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 114 transitions, 1049 flow. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:47,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:47,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:47,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:48,885 INFO L124 PetriNetUnfolderBase]: 1668/2787 cut-off events. [2024-06-14 13:38:48,885 INFO L125 PetriNetUnfolderBase]: For 141680/141680 co-relation queries the response was YES. [2024-06-14 13:38:48,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14290 conditions, 2787 events. 1668/2787 cut-off events. For 141680/141680 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15933 event pairs, 607 based on Foata normal form. 44/2820 useless extension candidates. Maximal degree in co-relation 14221. Up to 2121 conditions per place. [2024-06-14 13:38:48,902 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 41 changer transitions 21/140 dead transitions. [2024-06-14 13:38:48,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 140 transitions, 1395 flow [2024-06-14 13:38:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:38:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:38:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-14 13:38:48,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34460887949260044 [2024-06-14 13:38:48,903 INFO L175 Difference]: Start difference. First operand has 152 places, 114 transitions, 1049 flow. Second operand 11 states and 163 transitions. [2024-06-14 13:38:48,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 140 transitions, 1395 flow [2024-06-14 13:38:48,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 140 transitions, 1304 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:38:48,986 INFO L231 Difference]: Finished difference. Result has 151 places, 109 transitions, 1003 flow [2024-06-14 13:38:48,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1003, PETRI_PLACES=151, PETRI_TRANSITIONS=109} [2024-06-14 13:38:48,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 13:38:48,986 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 109 transitions, 1003 flow [2024-06-14 13:38:48,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:48,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:48,986 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, 1, 1] [2024-06-14 13:38:48,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:38:48,987 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 13:38:48,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash -713728093, now seen corresponding path program 2 times [2024-06-14 13:38:48,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852152954] [2024-06-14 13:38:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:52,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852152954] [2024-06-14 13:38:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852152954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492860949] [2024-06-14 13:38:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:52,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:52,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 109 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:52,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:52,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:54,278 INFO L124 PetriNetUnfolderBase]: 1986/3309 cut-off events. [2024-06-14 13:38:54,278 INFO L125 PetriNetUnfolderBase]: For 196350/196350 co-relation queries the response was YES. [2024-06-14 13:38:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19287 conditions, 3309 events. 1986/3309 cut-off events. For 196350/196350 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 19778 event pairs, 769 based on Foata normal form. 24/3324 useless extension candidates. Maximal degree in co-relation 19219. Up to 1745 conditions per place. [2024-06-14 13:38:54,302 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 45 changer transitions 9/145 dead transitions. [2024-06-14 13:38:54,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 145 transitions, 1583 flow [2024-06-14 13:38:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:38:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:38:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-14 13:38:54,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657505285412262 [2024-06-14 13:38:54,303 INFO L175 Difference]: Start difference. First operand has 151 places, 109 transitions, 1003 flow. Second operand 11 states and 173 transitions. [2024-06-14 13:38:54,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 145 transitions, 1583 flow [2024-06-14 13:38:54,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 1483 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 13:38:54,414 INFO L231 Difference]: Finished difference. Result has 146 places, 108 transitions, 1001 flow [2024-06-14 13:38:54,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1001, PETRI_PLACES=146, PETRI_TRANSITIONS=108} [2024-06-14 13:38:54,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 13:38:54,414 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 108 transitions, 1001 flow [2024-06-14 13:38:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:54,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:54,414 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, 1, 1] [2024-06-14 13:38:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:38:54,415 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -718489693, now seen corresponding path program 3 times [2024-06-14 13:38:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:54,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799110398] [2024-06-14 13:38:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:54,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:58,374 INFO 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 13:38:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799110398] [2024-06-14 13:38:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799110398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:58,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:38:58,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673635425] [2024-06-14 13:38:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:58,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:38:58,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:38:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:38:58,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:38:58,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 108 transitions, 1001 flow. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:58,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:58,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:38:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:59,613 INFO L124 PetriNetUnfolderBase]: 1856/3099 cut-off events. [2024-06-14 13:38:59,613 INFO L125 PetriNetUnfolderBase]: For 159312/159312 co-relation queries the response was YES. [2024-06-14 13:38:59,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17351 conditions, 3099 events. 1856/3099 cut-off events. For 159312/159312 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18286 event pairs, 925 based on Foata normal form. 24/3114 useless extension candidates. Maximal degree in co-relation 17285. Up to 2737 conditions per place. [2024-06-14 13:38:59,634 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 91 selfloop transitions, 14 changer transitions 16/126 dead transitions. [2024-06-14 13:38:59,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 126 transitions, 1305 flow [2024-06-14 13:38:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-14 13:38:59,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:38:59,636 INFO L175 Difference]: Start difference. First operand has 146 places, 108 transitions, 1001 flow. Second operand 9 states and 129 transitions. [2024-06-14 13:38:59,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 126 transitions, 1305 flow [2024-06-14 13:38:59,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 126 transitions, 1213 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 13:38:59,749 INFO L231 Difference]: Finished difference. Result has 144 places, 103 transitions, 895 flow [2024-06-14 13:38:59,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=895, PETRI_PLACES=144, PETRI_TRANSITIONS=103} [2024-06-14 13:38:59,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 13:38:59,750 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 103 transitions, 895 flow [2024-06-14 13:38:59,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 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 13:38:59,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:59,750 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, 1, 1] [2024-06-14 13:38:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:38:59,750 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:59,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1778191889, now seen corresponding path program 13 times [2024-06-14 13:38:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092970691] [2024-06-14 13:38:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:03,792 INFO 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 13:39:03,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:03,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092970691] [2024-06-14 13:39:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092970691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:03,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:03,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482104137] [2024-06-14 13:39:03,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:03,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:03,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:03,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:39:03,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 103 transitions, 895 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:03,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:03,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:39:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:04,840 INFO L124 PetriNetUnfolderBase]: 1560/2609 cut-off events. [2024-06-14 13:39:04,840 INFO L125 PetriNetUnfolderBase]: For 123898/123898 co-relation queries the response was YES. [2024-06-14 13:39:04,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13187 conditions, 2609 events. 1560/2609 cut-off events. For 123898/123898 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14885 event pairs, 591 based on Foata normal form. 44/2646 useless extension candidates. Maximal degree in co-relation 13121. Up to 2015 conditions per place. [2024-06-14 13:39:04,857 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 33 changer transitions 17/124 dead transitions. [2024-06-14 13:39:04,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 124 transitions, 1199 flow [2024-06-14 13:39:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:39:04,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 13:39:04,858 INFO L175 Difference]: Start difference. First operand has 144 places, 103 transitions, 895 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:39:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 124 transitions, 1199 flow [2024-06-14 13:39:04,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 124 transitions, 1155 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:39:04,933 INFO L231 Difference]: Finished difference. Result has 142 places, 99 transitions, 890 flow [2024-06-14 13:39:04,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=99} [2024-06-14 13:39:04,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 13:39:04,933 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 99 transitions, 890 flow [2024-06-14 13:39:04,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:04,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:04,933 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, 1, 1] [2024-06-14 13:39:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:39:04,933 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:39:04,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1777954739, now seen corresponding path program 14 times [2024-06-14 13:39:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:04,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930347211] [2024-06-14 13:39:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15