./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.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/safe014_rmo.oepc.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/safe014_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_rmo.oepc.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 13:12:40,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:12:40,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:12:40,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:12:40,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:12:40,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:12:40,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:12:40,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:12:40,153 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:12:40,157 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:12:40,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:12:40,157 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:12:40,158 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:12:40,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:12:40,160 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:12:40,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:12:40,161 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:12:40,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:12:40,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:12:40,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:12:40,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:12:40,163 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:12:40,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:12:40,164 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:12:40,164 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:12:40,164 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:12:40,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:12:40,165 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:12:40,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:12:40,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:12:40,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:12:40,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:12:40,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:12:40,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:12:40,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:12:40,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:12:40,169 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:12:40,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:12:40,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:12:40,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:12:40,170 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:12:40,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:12:40,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:12:40,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:12:40,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:12:40,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:12:40,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:12:40,474 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:12:40,474 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:12:40,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-14 13:12:41,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:12:42,038 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:12:42,039 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-14 13:12:42,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660381d99/66807dc5e1f14d198f1887fd03ba498e/FLAGf2dcb92af [2024-06-14 13:12:42,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660381d99/66807dc5e1f14d198f1887fd03ba498e [2024-06-14 13:12:42,071 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:12:42,076 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:12:42,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_rmo.oepc.yml/witness.yml [2024-06-14 13:12:42,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:12:42,317 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:12:42,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:12:42,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:12:42,323 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:12:42,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:12:42" (1/2) ... [2024-06-14 13:12:42,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f2ca0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:12:42, skipping insertion in model container [2024-06-14 13:12:42,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:12:42" (1/2) ... [2024-06-14 13:12:42,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3de2aa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:12:42, skipping insertion in model container [2024-06-14 13:12:42,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:12:42" (2/2) ... [2024-06-14 13:12:42,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f2ca0f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:12:42, skipping insertion in model container [2024-06-14 13:12:42,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:12:42" (2/2) ... [2024-06-14 13:12:42,327 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:12:42,477 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:12:42,478 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:12:42,479 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:12:42,479 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:12:42,479 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:12:42,479 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-14 13:12:42,530 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:12:42,932 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:12:42,942 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:12:43,075 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:12:43,126 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:12:43,127 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:12:43 WrapperNode [2024-06-14 13:12:43,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:12:43,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:12:43,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:12:43,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:12:43,135 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,167 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,208 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-14 13:12:43,209 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:12:43,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:12:43,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:12:43,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:12:43,220 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,220 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,224 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,244 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:12:43,245 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,245 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,275 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,277 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,279 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,281 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:12:43,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:12:43,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:12:43,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:12:43,308 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 01:12:43" (1/1) ... [2024-06-14 13:12:43,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:12:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:12:43,352 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 13:12:43,379 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 13:12:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:12:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:12:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:12:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:12:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:12:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:12:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:12:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:12:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:12:43,399 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:12:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:12:43,400 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:12:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:12:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:12:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:12:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:12:43,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:12:43,405 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 13:12:43,597 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:12:43,599 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:12:44,123 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:12:44,123 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:12:44,535 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:12:44,535 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:12:44,536 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:12:44 BoogieIcfgContainer [2024-06-14 13:12:44,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:12:44,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:12:44,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:12:44,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:12:44,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:12:42" (1/4) ... [2024-06-14 13:12:44,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae179c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:12:44, skipping insertion in model container [2024-06-14 13:12:44,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:12:42" (2/4) ... [2024-06-14 13:12:44,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae179c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:12:44, skipping insertion in model container [2024-06-14 13:12:44,542 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 01:12:43" (3/4) ... [2024-06-14 13:12:44,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae179c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:12:44, skipping insertion in model container [2024-06-14 13:12:44,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:12:44" (4/4) ... [2024-06-14 13:12:44,543 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.oepc.i [2024-06-14 13:12:44,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:12:44,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:12:44,563 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:12:44,651 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:12:44,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:12:44,731 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:12:44,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:12:44,734 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 13:12:44,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:12:44,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:12:44,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:12:44,762 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;@68d0283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:12:44,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:12:44,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:12:44,769 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:12:44,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:12:44,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:44,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:12:44,773 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 13:12:44,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1689671294, now seen corresponding path program 1 times [2024-06-14 13:12:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60899321] [2024-06-14 13:12:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60899321] [2024-06-14 13:12:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60899321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:46,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:46,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:12:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578378187] [2024-06-14 13:12:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:12:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:12:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:12:47,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:12:47,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:47,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:12:47,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:47,555 INFO L124 PetriNetUnfolderBase]: 770/1240 cut-off events. [2024-06-14 13:12:47,556 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:12:47,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2485 conditions, 1240 events. 770/1240 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5932 event pairs, 479 based on Foata normal form. 1/1209 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-14 13:12:47,568 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:12:47,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-14 13:12:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:12:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:12:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 13:12:47,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 13:12:47,581 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 13:12:47,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-14 13:12:47,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:47,586 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:12:47,587 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 13:12:47,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:12:47,591 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:12:47,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:47,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:47,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:12:47,592 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 13:12:47,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash -276429951, now seen corresponding path program 1 times [2024-06-14 13:12:47,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:47,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575781618] [2024-06-14 13:12:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:50,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575781618] [2024-06-14 13:12:50,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575781618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:50,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:50,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:12:50,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847633829] [2024-06-14 13:12:50,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:50,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:12:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:12:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:12:50,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:12:50,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:50,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:50,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:12:50,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:51,658 INFO L124 PetriNetUnfolderBase]: 764/1232 cut-off events. [2024-06-14 13:12:51,658 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-14 13:12:51,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1232 events. 764/1232 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5913 event pairs, 369 based on Foata normal form. 6/1234 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-14 13:12:51,669 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 13:12:51,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 260 flow [2024-06-14 13:12:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:12:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:12:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 13:12:51,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 13:12:51,673 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-14 13:12:51,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 260 flow [2024-06-14 13:12:51,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:12:51,677 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:12:51,678 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 13:12:51,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:12:51,681 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:12:51,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:51,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:51,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:12:51,687 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 13:12:51,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1670884209, now seen corresponding path program 1 times [2024-06-14 13:12:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630270895] [2024-06-14 13:12:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:56,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:56,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630270895] [2024-06-14 13:12:56,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630270895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:56,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:56,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:12:56,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566108904] [2024-06-14 13:12:56,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:56,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:12:56,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:56,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:12:56,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:12:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:12:56,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 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 13:12:56,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:56,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:12:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:57,083 INFO L124 PetriNetUnfolderBase]: 969/1527 cut-off events. [2024-06-14 13:12:57,083 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-14 13:12:57,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3918 conditions, 1527 events. 969/1527 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7189 event pairs, 305 based on Foata normal form. 12/1532 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-14 13:12:57,093 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:12:57,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-14 13:12:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:12:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:12:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:12:57,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 13:12:57,097 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:12:57,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-14 13:12:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:12:57,099 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 13:12:57,100 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 13:12:57,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 13:12:57,101 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 13:12:57,101 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 13:12:57,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:57,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:57,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:12:57,101 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 13:12:57,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1643235664, now seen corresponding path program 1 times [2024-06-14 13:12:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:57,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365320399] [2024-06-14 13:12:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365320399] [2024-06-14 13:12:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365320399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:12:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422763613] [2024-06-14 13:12:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:12:58,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:12:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:12:59,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:59,018 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 13:12:59,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:59,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:59,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:00,147 INFO L124 PetriNetUnfolderBase]: 1120/1740 cut-off events. [2024-06-14 13:13:00,148 INFO L125 PetriNetUnfolderBase]: For 1717/1717 co-relation queries the response was YES. [2024-06-14 13:13:00,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4890 conditions, 1740 events. 1120/1740 cut-off events. For 1717/1717 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8153 event pairs, 441 based on Foata normal form. 2/1740 useless extension candidates. Maximal degree in co-relation 4871. Up to 1665 conditions per place. [2024-06-14 13:13:00,162 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-14 13:13:00,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 390 flow [2024-06-14 13:13:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 13:13:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 13:13:00,166 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 93 transitions. [2024-06-14 13:13:00,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 390 flow [2024-06-14 13:13:00,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 359 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:00,173 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 230 flow [2024-06-14 13:13:00,173 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-06-14 13:13:00,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-14 13:13:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 230 flow [2024-06-14 13:13:00,175 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 13:13:00,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:00,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:13:00,176 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 13:13:00,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 641814213, now seen corresponding path program 1 times [2024-06-14 13:13:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:00,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262516885] [2024-06-14 13:13:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262516885] [2024-06-14 13:13:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262516885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961119617] [2024-06-14 13:13:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:02,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:03,053 INFO L124 PetriNetUnfolderBase]: 1115/1738 cut-off events. [2024-06-14 13:13:03,054 INFO L125 PetriNetUnfolderBase]: For 2509/2511 co-relation queries the response was YES. [2024-06-14 13:13:03,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 1738 events. 1115/1738 cut-off events. For 2509/2511 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8153 event pairs, 457 based on Foata normal form. 4/1741 useless extension candidates. Maximal degree in co-relation 5368. Up to 1660 conditions per place. [2024-06-14 13:13:03,067 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-14 13:13:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 393 flow [2024-06-14 13:13:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:13:03,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:13:03,075 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 230 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:13:03,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 393 flow [2024-06-14 13:13:03,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 13:13:03,083 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 259 flow [2024-06-14 13:13:03,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 13:13:03,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:13:03,086 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 259 flow [2024-06-14 13:13:03,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:03,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:03,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:13:03,087 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 13:13:03,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1622199307, now seen corresponding path program 1 times [2024-06-14 13:13:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113947531] [2024-06-14 13:13:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:06,488 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 13:13:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113947531] [2024-06-14 13:13:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113947531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:06,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:06,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910568675] [2024-06-14 13:13:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:06,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:06,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:06,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:06,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:06,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 259 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 13:13:06,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:06,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:07,788 INFO L124 PetriNetUnfolderBase]: 1128/1755 cut-off events. [2024-06-14 13:13:07,788 INFO L125 PetriNetUnfolderBase]: For 3324/3324 co-relation queries the response was YES. [2024-06-14 13:13:07,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 1755 events. 1128/1755 cut-off events. For 3324/3324 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8205 event pairs, 421 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 5624. Up to 1609 conditions per place. [2024-06-14 13:13:07,802 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-14 13:13:07,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 541 flow [2024-06-14 13:13:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:13:07,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:13:07,804 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 259 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:13:07,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 541 flow [2024-06-14 13:13:07,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 529 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:07,810 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 344 flow [2024-06-14 13:13:07,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-14 13:13:07,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 13:13:07,813 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 344 flow [2024-06-14 13:13:07,813 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 13:13:07,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:07,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:07,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:13:07,814 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 13:13:07,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1579986607, now seen corresponding path program 2 times [2024-06-14 13:13:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:07,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344901704] [2024-06-14 13:13:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:10,754 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 13:13:10,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344901704] [2024-06-14 13:13:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344901704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:10,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:10,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185716663] [2024-06-14 13:13:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:10,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:10,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:10,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:10,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:10,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 344 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 13:13:10,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:10,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:10,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:11,950 INFO L124 PetriNetUnfolderBase]: 1123/1743 cut-off events. [2024-06-14 13:13:11,950 INFO L125 PetriNetUnfolderBase]: For 4965/4971 co-relation queries the response was YES. [2024-06-14 13:13:11,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1743 events. 1123/1743 cut-off events. For 4965/4971 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8081 event pairs, 431 based on Foata normal form. 8/1748 useless extension candidates. Maximal degree in co-relation 6206. Up to 1606 conditions per place. [2024-06-14 13:13:11,964 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-14 13:13:11,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 598 flow [2024-06-14 13:13:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:13:11,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:13:11,967 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 344 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:13:11,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 598 flow [2024-06-14 13:13:11,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 576 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:11,977 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 392 flow [2024-06-14 13:13:11,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-14 13:13:11,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:13:11,978 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 392 flow [2024-06-14 13:13:11,978 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 13:13:11,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:11,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:13:11,979 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 13:13:11,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -43386718, now seen corresponding path program 1 times [2024-06-14 13:13:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:11,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788285307] [2024-06-14 13:13:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788285307] [2024-06-14 13:13:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788285307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:14,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054600206] [2024-06-14 13:13:14,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 392 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 13:13:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:15,997 INFO L124 PetriNetUnfolderBase]: 1227/1928 cut-off events. [2024-06-14 13:13:15,997 INFO L125 PetriNetUnfolderBase]: For 6304/6310 co-relation queries the response was YES. [2024-06-14 13:13:16,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7194 conditions, 1928 events. 1227/1928 cut-off events. For 6304/6310 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9296 event pairs, 378 based on Foata normal form. 9/1936 useless extension candidates. Maximal degree in co-relation 7164. Up to 1725 conditions per place. [2024-06-14 13:13:16,014 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 93 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-14 13:13:16,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 132 transitions, 932 flow [2024-06-14 13:13:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:13:16,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:13:16,017 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 392 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:13:16,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 132 transitions, 932 flow [2024-06-14 13:13:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 132 transitions, 899 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:16,026 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 605 flow [2024-06-14 13:13:16,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=605, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-14 13:13:16,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 13:13:16,028 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 605 flow [2024-06-14 13:13:16,029 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 13:13:16,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:16,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:13:16,029 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 13:13:16,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash 227084748, now seen corresponding path program 2 times [2024-06-14 13:13:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:16,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928264564] [2024-06-14 13:13:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:19,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:19,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928264564] [2024-06-14 13:13:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928264564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:19,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689665923] [2024-06-14 13:13:19,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:19,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:19,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:20,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:20,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 605 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 13:13:20,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:20,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:20,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:21,271 INFO L124 PetriNetUnfolderBase]: 1271/2003 cut-off events. [2024-06-14 13:13:21,271 INFO L125 PetriNetUnfolderBase]: For 9296/9304 co-relation queries the response was YES. [2024-06-14 13:13:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 2003 events. 1271/2003 cut-off events. For 9296/9304 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9762 event pairs, 348 based on Foata normal form. 11/2013 useless extension candidates. Maximal degree in co-relation 8339. Up to 1749 conditions per place. [2024-06-14 13:13:21,298 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 87 selfloop transitions, 42 changer transitions 0/134 dead transitions. [2024-06-14 13:13:21,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 1095 flow [2024-06-14 13:13:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:13:21,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:13:21,301 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 605 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:13:21,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 1095 flow [2024-06-14 13:13:21,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 1061 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:21,318 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 762 flow [2024-06-14 13:13:21,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-14 13:13:21,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 13:13:21,320 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 762 flow [2024-06-14 13:13:21,320 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 13:13:21,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:21,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:21,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:13:21,321 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 13:13:21,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 227204718, now seen corresponding path program 3 times [2024-06-14 13:13:21,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:21,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882286141] [2024-06-14 13:13:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:21,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882286141] [2024-06-14 13:13:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882286141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:24,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338549021] [2024-06-14 13:13:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:24,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:24,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:24,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 762 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 13:13:24,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:24,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:24,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:25,945 INFO L124 PetriNetUnfolderBase]: 1284/2020 cut-off events. [2024-06-14 13:13:25,945 INFO L125 PetriNetUnfolderBase]: For 12686/12688 co-relation queries the response was YES. [2024-06-14 13:13:25,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9362 conditions, 2020 events. 1284/2020 cut-off events. For 12686/12688 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9748 event pairs, 390 based on Foata normal form. 2/2019 useless extension candidates. Maximal degree in co-relation 9324. Up to 1680 conditions per place. [2024-06-14 13:13:25,962 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 41 changer transitions 0/143 dead transitions. [2024-06-14 13:13:25,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 143 transitions, 1373 flow [2024-06-14 13:13:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:13:25,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 13:13:25,965 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 762 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:13:25,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 143 transitions, 1373 flow [2024-06-14 13:13:25,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 1286 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:25,979 INFO L231 Difference]: Finished difference. Result has 88 places, 113 transitions, 1049 flow [2024-06-14 13:13:25,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=88, PETRI_TRANSITIONS=113} [2024-06-14 13:13:25,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 13:13:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 113 transitions, 1049 flow [2024-06-14 13:13:25,980 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 13:13:25,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:25,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:13:25,980 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 13:13:25,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 227204904, now seen corresponding path program 1 times [2024-06-14 13:13:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748243757] [2024-06-14 13:13:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:29,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:29,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748243757] [2024-06-14 13:13:29,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748243757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:29,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:29,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088409053] [2024-06-14 13:13:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:29,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:29,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:29,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 113 transitions, 1049 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:29,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:29,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:30,151 INFO L124 PetriNetUnfolderBase]: 1297/2042 cut-off events. [2024-06-14 13:13:30,151 INFO L125 PetriNetUnfolderBase]: For 15371/15379 co-relation queries the response was YES. [2024-06-14 13:13:30,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10140 conditions, 2042 events. 1297/2042 cut-off events. For 15371/15379 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9919 event pairs, 386 based on Foata normal form. 10/2050 useless extension candidates. Maximal degree in co-relation 10098. Up to 1842 conditions per place. [2024-06-14 13:13:30,163 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-14 13:13:30,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1467 flow [2024-06-14 13:13:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:13:30,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 13:13:30,166 INFO L175 Difference]: Start difference. First operand has 88 places, 113 transitions, 1049 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:13:30,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1467 flow [2024-06-14 13:13:30,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1419 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:30,184 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 1082 flow [2024-06-14 13:13:30,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1082, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2024-06-14 13:13:30,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-14 13:13:30,185 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 1082 flow [2024-06-14 13:13:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:30,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:30,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:13:30,186 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 13:13:30,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1734943732, now seen corresponding path program 4 times [2024-06-14 13:13:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:30,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095041165] [2024-06-14 13:13:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095041165] [2024-06-14 13:13:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095041165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:33,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:33,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806567473] [2024-06-14 13:13:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:33,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:33,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 1082 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 13:13:33,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:33,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:33,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:34,391 INFO L124 PetriNetUnfolderBase]: 1292/2022 cut-off events. [2024-06-14 13:13:34,391 INFO L125 PetriNetUnfolderBase]: For 16456/16464 co-relation queries the response was YES. [2024-06-14 13:13:34,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10127 conditions, 2022 events. 1292/2022 cut-off events. For 16456/16464 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9655 event pairs, 420 based on Foata normal form. 4/2021 useless extension candidates. Maximal degree in co-relation 10083. Up to 1685 conditions per place. [2024-06-14 13:13:34,405 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 47 changer transitions 0/145 dead transitions. [2024-06-14 13:13:34,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 145 transitions, 1514 flow [2024-06-14 13:13:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:13:34,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:13:34,408 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 1082 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:13:34,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 145 transitions, 1514 flow [2024-06-14 13:13:34,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 145 transitions, 1485 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:34,424 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 1193 flow [2024-06-14 13:13:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1193, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-06-14 13:13:34,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 13:13:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 1193 flow [2024-06-14 13:13:34,426 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 13:13:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:34,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:13:34,426 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 13:13:34,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1691807356, now seen corresponding path program 2 times [2024-06-14 13:13:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124440030] [2024-06-14 13:13:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:37,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:37,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124440030] [2024-06-14 13:13:37,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124440030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:37,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:37,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:37,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101286190] [2024-06-14 13:13:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:37,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:37,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:37,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 1193 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:37,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:37,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:37,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:38,086 INFO L124 PetriNetUnfolderBase]: 1287/2036 cut-off events. [2024-06-14 13:13:38,086 INFO L125 PetriNetUnfolderBase]: For 19112/19144 co-relation queries the response was YES. [2024-06-14 13:13:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10514 conditions, 2036 events. 1287/2036 cut-off events. For 19112/19144 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9899 event pairs, 398 based on Foata normal form. 34/2069 useless extension candidates. Maximal degree in co-relation 10469. Up to 1830 conditions per place. [2024-06-14 13:13:38,106 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 113 selfloop transitions, 23 changer transitions 0/141 dead transitions. [2024-06-14 13:13:38,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 141 transitions, 1543 flow [2024-06-14 13:13:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:13:38,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 13:13:38,108 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 1193 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:13:38,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 141 transitions, 1543 flow [2024-06-14 13:13:38,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1461 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:38,162 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1177 flow [2024-06-14 13:13:38,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1177, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2024-06-14 13:13:38,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 13:13:38,163 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1177 flow [2024-06-14 13:13:38,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:38,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:38,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:38,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:13:38,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:38,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1734697468, now seen corresponding path program 1 times [2024-06-14 13:13:38,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:38,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994590832] [2024-06-14 13:13:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:38,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:40,083 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 13:13:40,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994590832] [2024-06-14 13:13:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994590832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:40,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:40,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286217497] [2024-06-14 13:13:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:40,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:40,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:40,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:41,048 INFO L124 PetriNetUnfolderBase]: 1279/2015 cut-off events. [2024-06-14 13:13:41,048 INFO L125 PetriNetUnfolderBase]: For 20483/20489 co-relation queries the response was YES. [2024-06-14 13:13:41,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10428 conditions, 2015 events. 1279/2015 cut-off events. For 20483/20489 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9710 event pairs, 380 based on Foata normal form. 8/2022 useless extension candidates. Maximal degree in co-relation 10381. Up to 1878 conditions per place. [2024-06-14 13:13:41,065 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 125 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-06-14 13:13:41,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1527 flow [2024-06-14 13:13:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:13:41,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:13:41,068 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1177 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:13:41,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1527 flow [2024-06-14 13:13:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1496 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:41,093 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 1201 flow [2024-06-14 13:13:41,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1201, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-14 13:13:41,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 13:13:41,094 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 1201 flow [2024-06-14 13:13:41,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:41,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:41,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:41,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:13:41,094 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:41,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash 14586185, now seen corresponding path program 1 times [2024-06-14 13:13:41,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:41,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921511197] [2024-06-14 13:13:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:44,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:44,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921511197] [2024-06-14 13:13:44,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921511197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:44,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:44,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182561343] [2024-06-14 13:13:44,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:44,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:44,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 1201 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:44,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:44,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:45,310 INFO L124 PetriNetUnfolderBase]: 1263/1995 cut-off events. [2024-06-14 13:13:45,310 INFO L125 PetriNetUnfolderBase]: For 22023/22031 co-relation queries the response was YES. [2024-06-14 13:13:45,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10445 conditions, 1995 events. 1263/1995 cut-off events. For 22023/22031 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9651 event pairs, 371 based on Foata normal form. 14/2008 useless extension candidates. Maximal degree in co-relation 10396. Up to 1745 conditions per place. [2024-06-14 13:13:45,326 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 99 selfloop transitions, 56 changer transitions 0/160 dead transitions. [2024-06-14 13:13:45,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1635 flow [2024-06-14 13:13:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:13:45,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:13:45,329 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 1201 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:13:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1635 flow [2024-06-14 13:13:45,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1576 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:45,357 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 1274 flow [2024-06-14 13:13:45,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1274, PETRI_PLACES=105, PETRI_TRANSITIONS=122} [2024-06-14 13:13:45,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 13:13:45,359 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 1274 flow [2024-06-14 13:13:45,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:45,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:45,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:45,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:13:45,360 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 13:13:45,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash 14730335, now seen corresponding path program 2 times [2024-06-14 13:13:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:45,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473174287] [2024-06-14 13:13:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:48,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473174287] [2024-06-14 13:13:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473174287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:48,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368754981] [2024-06-14 13:13:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:48,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:48,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:48,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 1274 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 13:13:48,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:48,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:48,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:50,379 INFO L124 PetriNetUnfolderBase]: 1276/2014 cut-off events. [2024-06-14 13:13:50,379 INFO L125 PetriNetUnfolderBase]: For 24553/24555 co-relation queries the response was YES. [2024-06-14 13:13:50,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10811 conditions, 2014 events. 1276/2014 cut-off events. For 24553/24555 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9702 event pairs, 388 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 10761. Up to 1666 conditions per place. [2024-06-14 13:13:50,394 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-14 13:13:50,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 159 transitions, 1770 flow [2024-06-14 13:13:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:13:50,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:13:50,396 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 1274 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:13:50,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 159 transitions, 1770 flow [2024-06-14 13:13:50,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1642 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:50,425 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1290 flow [2024-06-14 13:13:50,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-14 13:13:50,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:13:50,426 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1290 flow [2024-06-14 13:13:50,427 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 13:13:50,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:50,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:13:50,427 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 13:13:50,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 14735915, now seen corresponding path program 3 times [2024-06-14 13:13:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:50,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695103634] [2024-06-14 13:13:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:53,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695103634] [2024-06-14 13:13:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695103634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:53,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22635438] [2024-06-14 13:13:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:53,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:53,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:53,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:53,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:53,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:54,800 INFO L124 PetriNetUnfolderBase]: 1307/2074 cut-off events. [2024-06-14 13:13:54,800 INFO L125 PetriNetUnfolderBase]: For 25008/25010 co-relation queries the response was YES. [2024-06-14 13:13:54,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 2074 events. 1307/2074 cut-off events. For 25008/25010 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10109 event pairs, 388 based on Foata normal form. 2/2074 useless extension candidates. Maximal degree in co-relation 10981. Up to 1699 conditions per place. [2024-06-14 13:13:54,814 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 52 changer transitions 0/162 dead transitions. [2024-06-14 13:13:54,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1884 flow [2024-06-14 13:13:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:13:54,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 13:13:54,819 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1290 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:13:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1884 flow [2024-06-14 13:13:54,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 1760 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:54,850 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1354 flow [2024-06-14 13:13:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1354, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-14 13:13:54,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 13:13:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1354 flow [2024-06-14 13:13:54,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:54,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:54,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:54,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:13:54,851 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 13:13:54,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1980659105, now seen corresponding path program 4 times [2024-06-14 13:13:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229637105] [2024-06-14 13:13:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:58,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229637105] [2024-06-14 13:13:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229637105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:58,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:58,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514985947] [2024-06-14 13:13:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:58,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:58,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:58,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1354 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 13:13:58,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:58,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:58,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:59,982 INFO L124 PetriNetUnfolderBase]: 1302/2050 cut-off events. [2024-06-14 13:13:59,982 INFO L125 PetriNetUnfolderBase]: For 27301/27309 co-relation queries the response was YES. [2024-06-14 13:13:59,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 2050 events. 1302/2050 cut-off events. For 27301/27309 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9856 event pairs, 427 based on Foata normal form. 4/2048 useless extension candidates. Maximal degree in co-relation 11006. Up to 1694 conditions per place. [2024-06-14 13:13:59,995 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 57 changer transitions 0/162 dead transitions. [2024-06-14 13:13:59,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 162 transitions, 1818 flow [2024-06-14 13:13:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:13:59,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:13:59,997 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1354 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:13:59,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 162 transitions, 1818 flow [2024-06-14 13:14:00,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1745 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:00,020 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 1403 flow [2024-06-14 13:14:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-06-14 13:14:00,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 13:14:00,021 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 1403 flow [2024-06-14 13:14:00,021 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 13:14:00,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:00,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:00,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:14:00,022 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 13:14:00,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -906419655, now seen corresponding path program 5 times [2024-06-14 13:14:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580722445] [2024-06-14 13:14:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:02,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580722445] [2024-06-14 13:14:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580722445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:02,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:02,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043207552] [2024-06-14 13:14:02,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:02,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:02,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:02,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 1403 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:02,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:04,225 INFO L124 PetriNetUnfolderBase]: 1297/2062 cut-off events. [2024-06-14 13:14:04,225 INFO L125 PetriNetUnfolderBase]: For 30481/30507 co-relation queries the response was YES. [2024-06-14 13:14:04,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11202 conditions, 2062 events. 1297/2062 cut-off events. For 30481/30507 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10093 event pairs, 422 based on Foata normal form. 15/2075 useless extension candidates. Maximal degree in co-relation 11149. Up to 1689 conditions per place. [2024-06-14 13:14:04,236 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 99 selfloop transitions, 52 changer transitions 0/156 dead transitions. [2024-06-14 13:14:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 156 transitions, 1786 flow [2024-06-14 13:14:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:14:04,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:14:04,237 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 1403 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:14:04,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 156 transitions, 1786 flow [2024-06-14 13:14:04,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 156 transitions, 1656 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:04,262 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1398 flow [2024-06-14 13:14:04,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-06-14 13:14:04,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-14 13:14:04,263 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1398 flow [2024-06-14 13:14:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:04,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:04,263 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 13:14:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:14:04,264 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 13:14:04,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 926389199, now seen corresponding path program 1 times [2024-06-14 13:14:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:04,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922178024] [2024-06-14 13:14:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922178024] [2024-06-14 13:14:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922178024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098467811] [2024-06-14 13:14:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:08,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:08,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1398 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 13:14:08,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:08,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:08,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:09,623 INFO L124 PetriNetUnfolderBase]: 1516/2416 cut-off events. [2024-06-14 13:14:09,623 INFO L125 PetriNetUnfolderBase]: For 38392/38400 co-relation queries the response was YES. [2024-06-14 13:14:09,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13304 conditions, 2416 events. 1516/2416 cut-off events. For 38392/38400 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12369 event pairs, 278 based on Foata normal form. 14/2429 useless extension candidates. Maximal degree in co-relation 13250. Up to 1747 conditions per place. [2024-06-14 13:14:09,639 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 125 selfloop transitions, 59 changer transitions 0/189 dead transitions. [2024-06-14 13:14:09,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 189 transitions, 2074 flow [2024-06-14 13:14:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 13:14:09,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 13:14:09,641 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1398 flow. Second operand 9 states and 175 transitions. [2024-06-14 13:14:09,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 189 transitions, 2074 flow [2024-06-14 13:14:09,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 1991 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:09,669 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1544 flow [2024-06-14 13:14:09,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1544, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2024-06-14 13:14:09,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 13:14:09,669 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1544 flow [2024-06-14 13:14:09,669 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 13:14:09,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:09,669 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 13:14:09,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:14:09,670 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:09,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash 341345301, now seen corresponding path program 2 times [2024-06-14 13:14:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848607882] [2024-06-14 13:14:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:13,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:13,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848607882] [2024-06-14 13:14:13,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848607882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:13,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:13,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606132974] [2024-06-14 13:14:13,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:13,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:13,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1544 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 13:14:13,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:13,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:13,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:14,565 INFO L124 PetriNetUnfolderBase]: 1503/2397 cut-off events. [2024-06-14 13:14:14,565 INFO L125 PetriNetUnfolderBase]: For 42303/42311 co-relation queries the response was YES. [2024-06-14 13:14:14,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13630 conditions, 2397 events. 1503/2397 cut-off events. For 42303/42311 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12246 event pairs, 375 based on Foata normal form. 14/2410 useless extension candidates. Maximal degree in co-relation 13573. Up to 2089 conditions per place. [2024-06-14 13:14:14,580 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 121 selfloop transitions, 59 changer transitions 0/185 dead transitions. [2024-06-14 13:14:14,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 185 transitions, 2076 flow [2024-06-14 13:14:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:14:14,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:14:14,582 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1544 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:14:14,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 185 transitions, 2076 flow [2024-06-14 13:14:14,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 185 transitions, 1971 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:14,620 INFO L231 Difference]: Finished difference. Result has 123 places, 142 transitions, 1620 flow [2024-06-14 13:14:14,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1620, PETRI_PLACES=123, PETRI_TRANSITIONS=142} [2024-06-14 13:14:14,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-14 13:14:14,621 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 142 transitions, 1620 flow [2024-06-14 13:14:14,621 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 13:14:14,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:14,621 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 13:14:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:14:14,622 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 13:14:14,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -699570547, now seen corresponding path program 3 times [2024-06-14 13:14:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499476184] [2024-06-14 13:14:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499476184] [2024-06-14 13:14:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499476184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020643930] [2024-06-14 13:14:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:17,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:17,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 142 transitions, 1620 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 13:14:17,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:17,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:19,297 INFO L124 PetriNetUnfolderBase]: 1523/2423 cut-off events. [2024-06-14 13:14:19,297 INFO L125 PetriNetUnfolderBase]: For 46811/46813 co-relation queries the response was YES. [2024-06-14 13:14:19,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14127 conditions, 2423 events. 1523/2423 cut-off events. For 46811/46813 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12348 event pairs, 392 based on Foata normal form. 4/2424 useless extension candidates. Maximal degree in co-relation 14068. Up to 2029 conditions per place. [2024-06-14 13:14:19,316 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 58 changer transitions 0/177 dead transitions. [2024-06-14 13:14:19,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 177 transitions, 2090 flow [2024-06-14 13:14:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:14:19,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:14:19,318 INFO L175 Difference]: Start difference. First operand has 123 places, 142 transitions, 1620 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:14:19,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 177 transitions, 2090 flow [2024-06-14 13:14:19,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 177 transitions, 1949 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:19,366 INFO L231 Difference]: Finished difference. Result has 124 places, 144 transitions, 1640 flow [2024-06-14 13:14:19,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1640, PETRI_PLACES=124, PETRI_TRANSITIONS=144} [2024-06-14 13:14:19,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:14:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 144 transitions, 1640 flow [2024-06-14 13:14:19,367 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 13:14:19,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:19,367 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 13:14:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:14:19,367 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 13:14:19,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -699385849, now seen corresponding path program 1 times [2024-06-14 13:14:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583849018] [2024-06-14 13:14:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:22,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583849018] [2024-06-14 13:14:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583849018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:22,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:22,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:22,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385976598] [2024-06-14 13:14:22,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:22,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:22,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 144 transitions, 1640 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:22,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:22,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:22,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:23,504 INFO L124 PetriNetUnfolderBase]: 1543/2460 cut-off events. [2024-06-14 13:14:23,504 INFO L125 PetriNetUnfolderBase]: For 50921/50929 co-relation queries the response was YES. [2024-06-14 13:14:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14494 conditions, 2460 events. 1543/2460 cut-off events. For 50921/50929 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12622 event pairs, 379 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 14434. Up to 2218 conditions per place. [2024-06-14 13:14:23,522 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-14 13:14:23,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 176 transitions, 2096 flow [2024-06-14 13:14:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:14:23,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:14:23,524 INFO L175 Difference]: Start difference. First operand has 124 places, 144 transitions, 1640 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:14:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 176 transitions, 2096 flow [2024-06-14 13:14:23,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 176 transitions, 1953 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:23,563 INFO L231 Difference]: Finished difference. Result has 125 places, 146 transitions, 1584 flow [2024-06-14 13:14:23,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1584, PETRI_PLACES=125, PETRI_TRANSITIONS=146} [2024-06-14 13:14:23,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 13:14:23,564 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 146 transitions, 1584 flow [2024-06-14 13:14:23,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:23,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:23,564 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 13:14:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:14:23,565 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 13:14:23,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash -833588053, now seen corresponding path program 4 times [2024-06-14 13:14:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433324332] [2024-06-14 13:14:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:26,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433324332] [2024-06-14 13:14:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433324332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:26,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:26,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915874504] [2024-06-14 13:14:26,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:26,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:26,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 146 transitions, 1584 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 13:14:26,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:26,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:26,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:28,038 INFO L124 PetriNetUnfolderBase]: 1535/2425 cut-off events. [2024-06-14 13:14:28,038 INFO L125 PetriNetUnfolderBase]: For 53655/53663 co-relation queries the response was YES. [2024-06-14 13:14:28,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14342 conditions, 2425 events. 1535/2425 cut-off events. For 53655/53663 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12291 event pairs, 432 based on Foata normal form. 6/2424 useless extension candidates. Maximal degree in co-relation 14281. Up to 2049 conditions per place. [2024-06-14 13:14:28,055 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 60 changer transitions 0/178 dead transitions. [2024-06-14 13:14:28,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 178 transitions, 2054 flow [2024-06-14 13:14:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:14:28,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:14:28,057 INFO L175 Difference]: Start difference. First operand has 125 places, 146 transitions, 1584 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:14:28,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 178 transitions, 2054 flow [2024-06-14 13:14:28,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 1985 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:28,106 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1686 flow [2024-06-14 13:14:28,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1686, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-14 13:14:28,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:14:28,106 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1686 flow [2024-06-14 13:14:28,106 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 13:14:28,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:28,107 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 13:14:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:14:28,107 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:28,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1965769571, now seen corresponding path program 2 times [2024-06-14 13:14:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:28,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746312085] [2024-06-14 13:14:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:28,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:30,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746312085] [2024-06-14 13:14:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746312085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:30,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:30,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:30,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015143505] [2024-06-14 13:14:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:30,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:30,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:30,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:30,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1686 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:30,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:30,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:30,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:31,955 INFO L124 PetriNetUnfolderBase]: 1555/2486 cut-off events. [2024-06-14 13:14:31,955 INFO L125 PetriNetUnfolderBase]: For 59061/59093 co-relation queries the response was YES. [2024-06-14 13:14:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14915 conditions, 2486 events. 1555/2486 cut-off events. For 59061/59093 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12859 event pairs, 397 based on Foata normal form. 36/2521 useless extension candidates. Maximal degree in co-relation 14853. Up to 2238 conditions per place. [2024-06-14 13:14:31,973 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 147 selfloop transitions, 25 changer transitions 0/177 dead transitions. [2024-06-14 13:14:31,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 177 transitions, 2142 flow [2024-06-14 13:14:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:14:31,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:14:31,975 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1686 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:14:31,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 177 transitions, 2142 flow [2024-06-14 13:14:32,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 177 transitions, 1989 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:32,069 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1624 flow [2024-06-14 13:14:32,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1624, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-14 13:14:32,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 13:14:32,070 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1624 flow [2024-06-14 13:14:32,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:32,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:32,070 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 13:14:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:14:32,071 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:32,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -596931325, now seen corresponding path program 3 times [2024-06-14 13:14:32,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:32,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571622118] [2024-06-14 13:14:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571622118] [2024-06-14 13:14:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571622118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:34,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:34,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:34,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781582061] [2024-06-14 13:14:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:34,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:34,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:34,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1624 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:34,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:34,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:34,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:35,847 INFO L124 PetriNetUnfolderBase]: 1547/2474 cut-off events. [2024-06-14 13:14:35,847 INFO L125 PetriNetUnfolderBase]: For 60737/60769 co-relation queries the response was YES. [2024-06-14 13:14:35,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14746 conditions, 2474 events. 1547/2474 cut-off events. For 60737/60769 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12831 event pairs, 359 based on Foata normal form. 36/2509 useless extension candidates. Maximal degree in co-relation 14683. Up to 2154 conditions per place. [2024-06-14 13:14:35,867 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-14 13:14:35,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 2092 flow [2024-06-14 13:14:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:14:35,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:14:35,869 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1624 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:14:35,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 2092 flow [2024-06-14 13:14:35,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 180 transitions, 2019 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:35,919 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1656 flow [2024-06-14 13:14:35,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1656, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-14 13:14:35,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 13:14:35,919 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1656 flow [2024-06-14 13:14:35,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:35,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:35,920 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 13:14:35,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:14:35,920 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 13:14:35,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash 274610177, now seen corresponding path program 1 times [2024-06-14 13:14:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:35,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120133701] [2024-06-14 13:14:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120133701] [2024-06-14 13:14:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120133701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:37,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:37,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697337214] [2024-06-14 13:14:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:14:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1656 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:37,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:37,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:14:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:38,609 INFO L124 PetriNetUnfolderBase]: 1446/2354 cut-off events. [2024-06-14 13:14:38,609 INFO L125 PetriNetUnfolderBase]: For 62667/62683 co-relation queries the response was YES. [2024-06-14 13:14:38,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14281 conditions, 2354 events. 1446/2354 cut-off events. For 62667/62683 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12368 event pairs, 384 based on Foata normal form. 16/2367 useless extension candidates. Maximal degree in co-relation 14217. Up to 2147 conditions per place. [2024-06-14 13:14:38,625 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 139 selfloop transitions, 10 changer transitions 0/166 dead transitions. [2024-06-14 13:14:38,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 166 transitions, 2002 flow [2024-06-14 13:14:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:14:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:14:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:14:38,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:14:38,626 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1656 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:14:38,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 166 transitions, 2002 flow [2024-06-14 13:14:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 166 transitions, 1915 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:38,677 INFO L231 Difference]: Finished difference. Result has 131 places, 155 transitions, 1619 flow [2024-06-14 13:14:38,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1619, PETRI_PLACES=131, PETRI_TRANSITIONS=155} [2024-06-14 13:14:38,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 13:14:38,678 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 155 transitions, 1619 flow [2024-06-14 13:14:38,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:38,678 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 13:14:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:14:38,678 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:38,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 420525804, now seen corresponding path program 1 times [2024-06-14 13:14:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230420389] [2024-06-14 13:14:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:38,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:42,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230420389] [2024-06-14 13:14:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230420389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:42,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75423926] [2024-06-14 13:14:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:42,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:42,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:42,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 155 transitions, 1619 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 13:14:42,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:42,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:42,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:44,042 INFO L124 PetriNetUnfolderBase]: 1609/2577 cut-off events. [2024-06-14 13:14:44,042 INFO L125 PetriNetUnfolderBase]: For 72007/72015 co-relation queries the response was YES. [2024-06-14 13:14:44,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15527 conditions, 2577 events. 1609/2577 cut-off events. For 72007/72015 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13365 event pairs, 273 based on Foata normal form. 26/2602 useless extension candidates. Maximal degree in co-relation 15462. Up to 1831 conditions per place. [2024-06-14 13:14:44,059 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 140 selfloop transitions, 63 changer transitions 0/208 dead transitions. [2024-06-14 13:14:44,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 208 transitions, 2321 flow [2024-06-14 13:14:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:14:44,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 13:14:44,060 INFO L175 Difference]: Start difference. First operand has 131 places, 155 transitions, 1619 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:14:44,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 208 transitions, 2321 flow [2024-06-14 13:14:44,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 2293 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:44,108 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1755 flow [2024-06-14 13:14:44,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1755, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-06-14 13:14:44,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 13:14:44,109 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1755 flow [2024-06-14 13:14:44,109 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 13:14:44,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:44,109 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 13:14:44,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:14:44,109 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:44,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1132449448, now seen corresponding path program 2 times [2024-06-14 13:14:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:44,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978135057] [2024-06-14 13:14:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:44,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978135057] [2024-06-14 13:14:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978135057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:47,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:47,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776301014] [2024-06-14 13:14:47,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:47,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1755 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 13:14:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:47,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:48,889 INFO L124 PetriNetUnfolderBase]: 1563/2507 cut-off events. [2024-06-14 13:14:48,889 INFO L125 PetriNetUnfolderBase]: For 70451/70459 co-relation queries the response was YES. [2024-06-14 13:14:48,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15024 conditions, 2507 events. 1563/2507 cut-off events. For 70451/70459 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12948 event pairs, 355 based on Foata normal form. 32/2538 useless extension candidates. Maximal degree in co-relation 14958. Up to 2075 conditions per place. [2024-06-14 13:14:48,906 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 141 selfloop transitions, 58 changer transitions 0/204 dead transitions. [2024-06-14 13:14:48,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 2316 flow [2024-06-14 13:14:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:14:48,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 13:14:48,908 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1755 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:14:48,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 2316 flow [2024-06-14 13:14:48,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 204 transitions, 2192 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:48,963 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1780 flow [2024-06-14 13:14:48,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1780, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-14 13:14:48,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 13:14:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1780 flow [2024-06-14 13:14:48,964 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 13:14:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:48,965 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 13:14:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:14:48,965 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:48,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash -211701592, now seen corresponding path program 3 times [2024-06-14 13:14:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752718849] [2024-06-14 13:14:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752718849] [2024-06-14 13:14:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752718849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:52,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:52,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:52,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708861185] [2024-06-14 13:14:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:52,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:52,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1780 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:52,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:52,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:52,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:54,421 INFO L124 PetriNetUnfolderBase]: 1631/2629 cut-off events. [2024-06-14 13:14:54,422 INFO L125 PetriNetUnfolderBase]: For 73097/73099 co-relation queries the response was YES. [2024-06-14 13:14:54,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15617 conditions, 2629 events. 1631/2629 cut-off events. For 73097/73099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13784 event pairs, 392 based on Foata normal form. 16/2642 useless extension candidates. Maximal degree in co-relation 15550. Up to 2133 conditions per place. [2024-06-14 13:14:54,439 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 57 changer transitions 0/200 dead transitions. [2024-06-14 13:14:54,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2322 flow [2024-06-14 13:14:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:14:54,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:14:54,441 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1780 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:14:54,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2322 flow [2024-06-14 13:14:54,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 200 transitions, 2210 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:54,499 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1817 flow [2024-06-14 13:14:54,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1817, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-14 13:14:54,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 13:14:54,500 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1817 flow [2024-06-14 13:14:54,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:54,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:54,500 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 13:14:54,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:14:54,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:54,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash -211849462, now seen corresponding path program 4 times [2024-06-14 13:14:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:54,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607611135] [2024-06-14 13:14:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:54,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:58,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:58,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607611135] [2024-06-14 13:14:58,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607611135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:58,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:58,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:58,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76253695] [2024-06-14 13:14:58,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:58,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:58,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:58,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:58,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:58,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1817 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:58,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:58,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:58,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:00,393 INFO L124 PetriNetUnfolderBase]: 1679/2713 cut-off events. [2024-06-14 13:15:00,393 INFO L125 PetriNetUnfolderBase]: For 77150/77152 co-relation queries the response was YES. [2024-06-14 13:15:00,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16210 conditions, 2713 events. 1679/2713 cut-off events. For 77150/77152 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14429 event pairs, 386 based on Foata normal form. 12/2722 useless extension candidates. Maximal degree in co-relation 16142. Up to 2111 conditions per place. [2024-06-14 13:15:00,413 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 60 changer transitions 0/209 dead transitions. [2024-06-14 13:15:00,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2407 flow [2024-06-14 13:15:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:15:00,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 13:15:00,415 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1817 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:15:00,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2407 flow [2024-06-14 13:15:00,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 209 transitions, 2276 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:00,474 INFO L231 Difference]: Finished difference. Result has 145 places, 160 transitions, 1842 flow [2024-06-14 13:15:00,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1842, PETRI_PLACES=145, PETRI_TRANSITIONS=160} [2024-06-14 13:15:00,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 13:15:00,475 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 160 transitions, 1842 flow [2024-06-14 13:15:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:00,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:00,475 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 13:15:00,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:15:00,475 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:00,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -206339212, now seen corresponding path program 5 times [2024-06-14 13:15:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135355214] [2024-06-14 13:15:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:03,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135355214] [2024-06-14 13:15:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135355214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:03,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733570762] [2024-06-14 13:15:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 160 transitions, 1842 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 13:15:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:03,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:05,399 INFO L124 PetriNetUnfolderBase]: 1747/2844 cut-off events. [2024-06-14 13:15:05,399 INFO L125 PetriNetUnfolderBase]: For 84010/84012 co-relation queries the response was YES. [2024-06-14 13:15:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16840 conditions, 2844 events. 1747/2844 cut-off events. For 84010/84012 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15517 event pairs, 422 based on Foata normal form. 16/2858 useless extension candidates. Maximal degree in co-relation 16771. Up to 2333 conditions per place. [2024-06-14 13:15:05,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 54 changer transitions 0/197 dead transitions. [2024-06-14 13:15:05,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2368 flow [2024-06-14 13:15:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:15:05,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:15:05,423 INFO L175 Difference]: Start difference. First operand has 145 places, 160 transitions, 1842 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:15:05,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2368 flow [2024-06-14 13:15:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 197 transitions, 2226 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:05,490 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1847 flow [2024-06-14 13:15:05,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1847, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-14 13:15:05,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 13:15:05,491 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1847 flow [2024-06-14 13:15:05,492 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 13:15:05,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:05,492 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 13:15:05,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:15:05,492 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:05,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1037529692, now seen corresponding path program 1 times [2024-06-14 13:15:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128949531] [2024-06-14 13:15:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128949531] [2024-06-14 13:15:08,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128949531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:08,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:08,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:08,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333166898] [2024-06-14 13:15:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:08,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:08,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:08,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1847 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 13:15:08,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:08,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:08,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:10,092 INFO L124 PetriNetUnfolderBase]: 1891/3100 cut-off events. [2024-06-14 13:15:10,092 INFO L125 PetriNetUnfolderBase]: For 97129/97131 co-relation queries the response was YES. [2024-06-14 13:15:10,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18555 conditions, 3100 events. 1891/3100 cut-off events. For 97129/97131 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17477 event pairs, 446 based on Foata normal form. 12/3110 useless extension candidates. Maximal degree in co-relation 18485. Up to 2087 conditions per place. [2024-06-14 13:15:10,112 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 59 changer transitions 0/204 dead transitions. [2024-06-14 13:15:10,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 204 transitions, 2559 flow [2024-06-14 13:15:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:15:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:15:10,115 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1847 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:15:10,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 204 transitions, 2559 flow [2024-06-14 13:15:10,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 204 transitions, 2430 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:10,183 INFO L231 Difference]: Finished difference. Result has 147 places, 163 transitions, 1908 flow [2024-06-14 13:15:10,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1908, PETRI_PLACES=147, PETRI_TRANSITIONS=163} [2024-06-14 13:15:10,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 13:15:10,184 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 163 transitions, 1908 flow [2024-06-14 13:15:10,184 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 13:15:10,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:10,184 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 13:15:10,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:15:10,184 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:10,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1590913544, now seen corresponding path program 6 times [2024-06-14 13:15:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:10,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626372441] [2024-06-14 13:15:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626372441] [2024-06-14 13:15:13,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626372441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:13,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:13,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510339403] [2024-06-14 13:15:13,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:13,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:13,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 163 transitions, 1908 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 13:15:13,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:13,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:13,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:14,903 INFO L124 PetriNetUnfolderBase]: 1959/3230 cut-off events. [2024-06-14 13:15:14,903 INFO L125 PetriNetUnfolderBase]: For 106513/106539 co-relation queries the response was YES. [2024-06-14 13:15:14,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19250 conditions, 3230 events. 1959/3230 cut-off events. For 106513/106539 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18500 event pairs, 520 based on Foata normal form. 29/3257 useless extension candidates. Maximal degree in co-relation 19179. Up to 2693 conditions per place. [2024-06-14 13:15:14,928 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 53 changer transitions 0/197 dead transitions. [2024-06-14 13:15:14,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 197 transitions, 2430 flow [2024-06-14 13:15:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:15:14,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:15:14,930 INFO L175 Difference]: Start difference. First operand has 147 places, 163 transitions, 1908 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:15:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 197 transitions, 2430 flow [2024-06-14 13:15:15,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 197 transitions, 2336 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:15,031 INFO L231 Difference]: Finished difference. Result has 151 places, 164 transitions, 1963 flow [2024-06-14 13:15:15,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1963, PETRI_PLACES=151, PETRI_TRANSITIONS=164} [2024-06-14 13:15:15,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 13:15:15,032 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 164 transitions, 1963 flow [2024-06-14 13:15:15,032 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 13:15:15,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:15,032 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 13:15:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:15:15,032 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:15,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash -218749190, now seen corresponding path program 7 times [2024-06-14 13:15:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519732182] [2024-06-14 13:15:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:18,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:18,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519732182] [2024-06-14 13:15:18,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519732182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:18,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:18,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687697314] [2024-06-14 13:15:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:18,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:18,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:18,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:18,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 164 transitions, 1963 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:18,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:18,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:20,384 INFO L124 PetriNetUnfolderBase]: 1931/3167 cut-off events. [2024-06-14 13:15:20,384 INFO L125 PetriNetUnfolderBase]: For 101419/101427 co-relation queries the response was YES. [2024-06-14 13:15:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18655 conditions, 3167 events. 1931/3167 cut-off events. For 101419/101427 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17977 event pairs, 509 based on Foata normal form. 18/3179 useless extension candidates. Maximal degree in co-relation 18582. Up to 2649 conditions per place. [2024-06-14 13:15:20,409 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 59 changer transitions 0/202 dead transitions. [2024-06-14 13:15:20,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 202 transitions, 2475 flow [2024-06-14 13:15:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:15:20,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:15:20,411 INFO L175 Difference]: Start difference. First operand has 151 places, 164 transitions, 1963 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:15:20,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 202 transitions, 2475 flow [2024-06-14 13:15:20,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2330 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:20,521 INFO L231 Difference]: Finished difference. Result has 154 places, 164 transitions, 1943 flow [2024-06-14 13:15:20,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1943, PETRI_PLACES=154, PETRI_TRANSITIONS=164} [2024-06-14 13:15:20,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 13:15:20,521 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 164 transitions, 1943 flow [2024-06-14 13:15:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:20,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:20,522 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 13:15:20,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:15:20,522 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:20,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -712703890, now seen corresponding path program 8 times [2024-06-14 13:15:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527183066] [2024-06-14 13:15:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:24,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:24,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527183066] [2024-06-14 13:15:24,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527183066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:24,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:24,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:24,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72008601] [2024-06-14 13:15:24,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:24,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:24,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 164 transitions, 1943 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:24,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:24,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:24,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:26,512 INFO L124 PetriNetUnfolderBase]: 1951/3207 cut-off events. [2024-06-14 13:15:26,513 INFO L125 PetriNetUnfolderBase]: For 99699/99707 co-relation queries the response was YES. [2024-06-14 13:15:26,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18562 conditions, 3207 events. 1951/3207 cut-off events. For 99699/99707 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18289 event pairs, 501 based on Foata normal form. 14/3215 useless extension candidates. Maximal degree in co-relation 18488. Up to 2583 conditions per place. [2024-06-14 13:15:26,537 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 62 changer transitions 0/211 dead transitions. [2024-06-14 13:15:26,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 211 transitions, 2537 flow [2024-06-14 13:15:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 13:15:26,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-14 13:15:26,539 INFO L175 Difference]: Start difference. First operand has 154 places, 164 transitions, 1943 flow. Second operand 10 states and 179 transitions. [2024-06-14 13:15:26,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 211 transitions, 2537 flow [2024-06-14 13:15:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 211 transitions, 2414 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:26,649 INFO L231 Difference]: Finished difference. Result has 157 places, 165 transitions, 1988 flow [2024-06-14 13:15:26,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1988, PETRI_PLACES=157, PETRI_TRANSITIONS=165} [2024-06-14 13:15:26,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:15:26,650 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 165 transitions, 1988 flow [2024-06-14 13:15:26,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:26,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:26,650 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 13:15:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:15:26,650 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:26,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 804558218, now seen corresponding path program 2 times [2024-06-14 13:15:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:26,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486417743] [2024-06-14 13:15:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:29,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486417743] [2024-06-14 13:15:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486417743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:29,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557237411] [2024-06-14 13:15:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:29,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:29,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 165 transitions, 1988 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 13:15:29,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:29,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:29,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:31,361 INFO L124 PetriNetUnfolderBase]: 1999/3322 cut-off events. [2024-06-14 13:15:31,361 INFO L125 PetriNetUnfolderBase]: For 107019/107045 co-relation queries the response was YES. [2024-06-14 13:15:31,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19168 conditions, 3322 events. 1999/3322 cut-off events. For 107019/107045 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19324 event pairs, 514 based on Foata normal form. 25/3345 useless extension candidates. Maximal degree in co-relation 19093. Up to 2667 conditions per place. [2024-06-14 13:15:31,386 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 55 changer transitions 0/202 dead transitions. [2024-06-14 13:15:31,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2536 flow [2024-06-14 13:15:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:15:31,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:15:31,387 INFO L175 Difference]: Start difference. First operand has 157 places, 165 transitions, 1988 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:15:31,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2536 flow [2024-06-14 13:15:31,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 202 transitions, 2382 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:31,484 INFO L231 Difference]: Finished difference. Result has 157 places, 166 transitions, 1990 flow [2024-06-14 13:15:31,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1990, PETRI_PLACES=157, PETRI_TRANSITIONS=166} [2024-06-14 13:15:31,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:15:31,485 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 166 transitions, 1990 flow [2024-06-14 13:15:31,485 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 13:15:31,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:31,485 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 13:15:31,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:15:31,485 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:31,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1325001062, now seen corresponding path program 3 times [2024-06-14 13:15:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:31,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521786996] [2024-06-14 13:15:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:34,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:34,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521786996] [2024-06-14 13:15:34,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521786996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:34,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:34,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712961123] [2024-06-14 13:15:34,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:34,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:34,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:34,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:34,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 166 transitions, 1990 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 13:15:34,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:34,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:34,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:35,750 INFO L124 PetriNetUnfolderBase]: 1979/3290 cut-off events. [2024-06-14 13:15:35,750 INFO L125 PetriNetUnfolderBase]: For 102672/102698 co-relation queries the response was YES. [2024-06-14 13:15:35,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18491 conditions, 3290 events. 1979/3290 cut-off events. For 102672/102698 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19114 event pairs, 449 based on Foata normal form. 25/3313 useless extension candidates. Maximal degree in co-relation 18415. Up to 1935 conditions per place. [2024-06-14 13:15:35,774 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 133 selfloop transitions, 64 changer transitions 0/202 dead transitions. [2024-06-14 13:15:35,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 202 transitions, 2430 flow [2024-06-14 13:15:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:15:35,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:15:35,776 INFO L175 Difference]: Start difference. First operand has 157 places, 166 transitions, 1990 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:15:35,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 202 transitions, 2430 flow [2024-06-14 13:15:35,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 202 transitions, 2288 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:35,907 INFO L231 Difference]: Finished difference. Result has 158 places, 165 transitions, 1908 flow [2024-06-14 13:15:35,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1908, PETRI_PLACES=158, PETRI_TRANSITIONS=165} [2024-06-14 13:15:35,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 13:15:35,908 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 165 transitions, 1908 flow [2024-06-14 13:15:35,908 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 13:15:35,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:35,908 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 13:15:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:15:35,908 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 13:15:35,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1349803723, now seen corresponding path program 1 times [2024-06-14 13:15:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:35,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916347873] [2024-06-14 13:15:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:37,717 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 13:15:37,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916347873] [2024-06-14 13:15:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916347873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:37,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:37,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95126709] [2024-06-14 13:15:37,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:37,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:37,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:37,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:37,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 165 transitions, 1908 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 13:15:37,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:37,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:37,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:38,901 INFO L124 PetriNetUnfolderBase]: 1984/3291 cut-off events. [2024-06-14 13:15:38,901 INFO L125 PetriNetUnfolderBase]: For 97637/97639 co-relation queries the response was YES. [2024-06-14 13:15:38,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18582 conditions, 3291 events. 1984/3291 cut-off events. For 97637/97639 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19164 event pairs, 488 based on Foata normal form. 1/3290 useless extension candidates. Maximal degree in co-relation 18505. Up to 3080 conditions per place. [2024-06-14 13:15:38,924 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 165 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-14 13:15:38,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 191 transitions, 2594 flow [2024-06-14 13:15:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:15:38,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:15:38,926 INFO L175 Difference]: Start difference. First operand has 158 places, 165 transitions, 1908 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:15:38,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 191 transitions, 2594 flow [2024-06-14 13:15:39,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 191 transitions, 2395 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:39,034 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 1899 flow [2024-06-14 13:15:39,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1899, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-14 13:15:39,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 13:15:39,036 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 1899 flow [2024-06-14 13:15:39,036 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 13:15:39,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:39,036 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 13:15:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:15:39,036 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 13:15:39,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 438657391, now seen corresponding path program 2 times [2024-06-14 13:15:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515374792] [2024-06-14 13:15:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:40,790 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 13:15:40,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515374792] [2024-06-14 13:15:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515374792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:40,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826541212] [2024-06-14 13:15:40,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:40,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:40,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:40,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:40,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 1899 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 13:15:40,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:40,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:40,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:41,819 INFO L124 PetriNetUnfolderBase]: 1989/3304 cut-off events. [2024-06-14 13:15:41,820 INFO L125 PetriNetUnfolderBase]: For 99947/99949 co-relation queries the response was YES. [2024-06-14 13:15:41,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18455 conditions, 3304 events. 1989/3304 cut-off events. For 99947/99949 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19245 event pairs, 483 based on Foata normal form. 1/3304 useless extension candidates. Maximal degree in co-relation 18377. Up to 3096 conditions per place. [2024-06-14 13:15:41,843 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 173 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-14 13:15:41,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 197 transitions, 2456 flow [2024-06-14 13:15:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:15:41,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:15:41,845 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 1899 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:15:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 197 transitions, 2456 flow [2024-06-14 13:15:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 197 transitions, 2366 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-14 13:15:41,947 INFO L231 Difference]: Finished difference. Result has 164 places, 177 transitions, 1912 flow [2024-06-14 13:15:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1912, PETRI_PLACES=164, PETRI_TRANSITIONS=177} [2024-06-14 13:15:41,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 13:15:41,948 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 177 transitions, 1912 flow [2024-06-14 13:15:41,948 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 13:15:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:41,948 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 13:15:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:15:41,949 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 13:15:41,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1803682282, now seen corresponding path program 1 times [2024-06-14 13:15:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148788869] [2024-06-14 13:15:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148788869] [2024-06-14 13:15:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148788869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:45,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:45,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680028185] [2024-06-14 13:15:45,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:45,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:45,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:45,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:15:45,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 177 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:45,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:45,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:15:45,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:46,416 INFO L124 PetriNetUnfolderBase]: 1910/3210 cut-off events. [2024-06-14 13:15:46,416 INFO L125 PetriNetUnfolderBase]: For 108398/108414 co-relation queries the response was YES. [2024-06-14 13:15:46,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18128 conditions, 3210 events. 1910/3210 cut-off events. For 108398/108414 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19039 event pairs, 450 based on Foata normal form. 18/3201 useless extension candidates. Maximal degree in co-relation 18046. Up to 2863 conditions per place. [2024-06-14 13:15:46,443 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 153 selfloop transitions, 41 changer transitions 0/211 dead transitions. [2024-06-14 13:15:46,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2539 flow [2024-06-14 13:15:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:15:46,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:15:46,445 INFO L175 Difference]: Start difference. First operand has 164 places, 177 transitions, 1912 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:15:46,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2539 flow [2024-06-14 13:15:46,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 2505 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:46,553 INFO L231 Difference]: Finished difference. Result has 168 places, 188 transitions, 2077 flow [2024-06-14 13:15:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2077, PETRI_PLACES=168, PETRI_TRANSITIONS=188} [2024-06-14 13:15:46,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-14 13:15:46,554 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 188 transitions, 2077 flow [2024-06-14 13:15:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:46,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:46,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:15:46,554 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 13:15:46,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash 713294912, now seen corresponding path program 2 times [2024-06-14 13:15:46,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:46,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27411636] [2024-06-14 13:15:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:46,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:49,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:49,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27411636] [2024-06-14 13:15:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27411636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:49,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113452974] [2024-06-14 13:15:49,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:15:49,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 188 transitions, 2077 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:49,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:49,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:15:49,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:50,281 INFO L124 PetriNetUnfolderBase]: 1897/3193 cut-off events. [2024-06-14 13:15:50,281 INFO L125 PetriNetUnfolderBase]: For 111464/111475 co-relation queries the response was YES. [2024-06-14 13:15:50,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18422 conditions, 3193 events. 1897/3193 cut-off events. For 111464/111475 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18961 event pairs, 451 based on Foata normal form. 13/3179 useless extension candidates. Maximal degree in co-relation 18339. Up to 2855 conditions per place. [2024-06-14 13:15:50,304 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 151 selfloop transitions, 39 changer transitions 0/207 dead transitions. [2024-06-14 13:15:50,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 207 transitions, 2509 flow [2024-06-14 13:15:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:15:50,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:15:50,306 INFO L175 Difference]: Start difference. First operand has 168 places, 188 transitions, 2077 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:15:50,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 207 transitions, 2509 flow [2024-06-14 13:15:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 207 transitions, 2457 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 13:15:50,427 INFO L231 Difference]: Finished difference. Result has 172 places, 188 transitions, 2118 flow [2024-06-14 13:15:50,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2118, PETRI_PLACES=172, PETRI_TRANSITIONS=188} [2024-06-14 13:15:50,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:15:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 188 transitions, 2118 flow [2024-06-14 13:15:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:50,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:50,428 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 13:15:50,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:15:50,429 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 13:15:50,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 713710622, now seen corresponding path program 3 times [2024-06-14 13:15:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:50,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838056975] [2024-06-14 13:15:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:50,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:52,943 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 13:15:52,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:52,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838056975] [2024-06-14 13:15:52,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838056975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:52,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:52,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835966130] [2024-06-14 13:15:52,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:52,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:15:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 188 transitions, 2118 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:52,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:15:52,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:54,076 INFO L124 PetriNetUnfolderBase]: 1884/3164 cut-off events. [2024-06-14 13:15:54,076 INFO L125 PetriNetUnfolderBase]: For 113741/113755 co-relation queries the response was YES. [2024-06-14 13:15:54,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18324 conditions, 3164 events. 1884/3164 cut-off events. For 113741/113755 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18764 event pairs, 455 based on Foata normal form. 17/3148 useless extension candidates. Maximal degree in co-relation 18239. Up to 2827 conditions per place. [2024-06-14 13:15:54,102 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 43 changer transitions 0/204 dead transitions. [2024-06-14 13:15:54,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 204 transitions, 2554 flow [2024-06-14 13:15:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:15:54,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:15:54,103 INFO L175 Difference]: Start difference. First operand has 172 places, 188 transitions, 2118 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:15:54,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 204 transitions, 2554 flow [2024-06-14 13:15:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 204 transitions, 2466 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:54,225 INFO L231 Difference]: Finished difference. Result has 172 places, 191 transitions, 2156 flow [2024-06-14 13:15:54,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2156, PETRI_PLACES=172, PETRI_TRANSITIONS=191} [2024-06-14 13:15:54,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:15:54,226 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 191 transitions, 2156 flow [2024-06-14 13:15:54,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:54,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:54,226 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 13:15:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:15:54,226 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 13:15:54,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1729948422, now seen corresponding path program 1 times [2024-06-14 13:15:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:54,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949777868] [2024-06-14 13:15:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:55,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949777868] [2024-06-14 13:15:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949777868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:55,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:55,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:55,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097241358] [2024-06-14 13:15:55,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:55,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:55,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:55,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 191 transitions, 2156 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:55,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:55,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:55,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:57,191 INFO L124 PetriNetUnfolderBase]: 2032/3374 cut-off events. [2024-06-14 13:15:57,191 INFO L125 PetriNetUnfolderBase]: For 112228/112234 co-relation queries the response was YES. [2024-06-14 13:15:57,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19541 conditions, 3374 events. 2032/3374 cut-off events. For 112228/112234 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19737 event pairs, 489 based on Foata normal form. 5/3378 useless extension candidates. Maximal degree in co-relation 19456. Up to 3147 conditions per place. [2024-06-14 13:15:57,215 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 180 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-14 13:15:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2733 flow [2024-06-14 13:15:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:15:57,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:15:57,217 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 2156 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:15:57,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2733 flow [2024-06-14 13:15:57,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2629 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:57,335 INFO L231 Difference]: Finished difference. Result has 174 places, 194 transitions, 2149 flow [2024-06-14 13:15:57,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2149, PETRI_PLACES=174, PETRI_TRANSITIONS=194} [2024-06-14 13:15:57,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-14 13:15:57,336 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 194 transitions, 2149 flow [2024-06-14 13:15:57,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:57,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:57,336 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 13:15:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:15:57,336 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 13:15:57,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1105207586, now seen corresponding path program 1 times [2024-06-14 13:15:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631729571] [2024-06-14 13:15:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631729571] [2024-06-14 13:15:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631729571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:59,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567288464] [2024-06-14 13:15:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:59,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:59,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:59,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 194 transitions, 2149 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 13:15:59,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:59,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:00,892 INFO L124 PetriNetUnfolderBase]: 2042/3382 cut-off events. [2024-06-14 13:16:00,893 INFO L125 PetriNetUnfolderBase]: For 117202/117204 co-relation queries the response was YES. [2024-06-14 13:16:00,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19606 conditions, 3382 events. 2042/3382 cut-off events. For 117202/117204 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19687 event pairs, 486 based on Foata normal form. 2/3382 useless extension candidates. Maximal degree in co-relation 19520. Up to 3111 conditions per place. [2024-06-14 13:16:00,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 185 selfloop transitions, 34 changer transitions 0/224 dead transitions. [2024-06-14 13:16:00,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 2921 flow [2024-06-14 13:16:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:16:00,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:16:00,919 INFO L175 Difference]: Start difference. First operand has 174 places, 194 transitions, 2149 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:16:00,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 2921 flow [2024-06-14 13:16:01,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 224 transitions, 2837 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:01,040 INFO L231 Difference]: Finished difference. Result has 178 places, 203 transitions, 2283 flow [2024-06-14 13:16:01,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2283, PETRI_PLACES=178, PETRI_TRANSITIONS=203} [2024-06-14 13:16:01,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-14 13:16:01,040 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 203 transitions, 2283 flow [2024-06-14 13:16:01,041 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 13:16:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:01,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:16:01,041 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 13:16:01,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash -471518016, now seen corresponding path program 2 times [2024-06-14 13:16:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598014671] [2024-06-14 13:16:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:03,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598014671] [2024-06-14 13:16:03,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598014671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:03,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:03,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923333155] [2024-06-14 13:16:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:03,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:03,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:03,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:03,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:03,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 203 transitions, 2283 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 13:16:03,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:03,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:03,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:04,721 INFO L124 PetriNetUnfolderBase]: 2039/3379 cut-off events. [2024-06-14 13:16:04,721 INFO L125 PetriNetUnfolderBase]: For 121650/121652 co-relation queries the response was YES. [2024-06-14 13:16:04,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20093 conditions, 3379 events. 2039/3379 cut-off events. For 121650/121652 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19706 event pairs, 490 based on Foata normal form. 1/3378 useless extension candidates. Maximal degree in co-relation 20006. Up to 3158 conditions per place. [2024-06-14 13:16:04,750 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 188 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-14 13:16:04,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 220 transitions, 2845 flow [2024-06-14 13:16:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:16:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:16:04,752 INFO L175 Difference]: Start difference. First operand has 178 places, 203 transitions, 2283 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:16:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 220 transitions, 2845 flow [2024-06-14 13:16:04,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 220 transitions, 2793 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 13:16:04,956 INFO L231 Difference]: Finished difference. Result has 183 places, 203 transitions, 2291 flow [2024-06-14 13:16:04,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2291, PETRI_PLACES=183, PETRI_TRANSITIONS=203} [2024-06-14 13:16:04,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 13:16:04,956 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 203 transitions, 2291 flow [2024-06-14 13:16:04,957 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 13:16:04,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:04,957 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 13:16:04,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:16:04,957 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 13:16:04,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 713716574, now seen corresponding path program 2 times [2024-06-14 13:16:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:04,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026168428] [2024-06-14 13:16:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026168428] [2024-06-14 13:16:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026168428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858878778] [2024-06-14 13:16:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:07,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:07,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:07,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 203 transitions, 2291 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 13:16:07,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:07,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:07,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:08,459 INFO L124 PetriNetUnfolderBase]: 2065/3423 cut-off events. [2024-06-14 13:16:08,459 INFO L125 PetriNetUnfolderBase]: For 128109/128111 co-relation queries the response was YES. [2024-06-14 13:16:08,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 3423 events. 2065/3423 cut-off events. For 128109/128111 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19981 event pairs, 477 based on Foata normal form. 2/3424 useless extension candidates. Maximal degree in co-relation 20258. Up to 3160 conditions per place. [2024-06-14 13:16:08,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 198 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2024-06-14 13:16:08,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 231 transitions, 3053 flow [2024-06-14 13:16:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:16:08,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:16:08,490 INFO L175 Difference]: Start difference. First operand has 183 places, 203 transitions, 2291 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:16:08,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 231 transitions, 3053 flow [2024-06-14 13:16:08,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 231 transitions, 2961 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:08,651 INFO L231 Difference]: Finished difference. Result has 185 places, 209 transitions, 2355 flow [2024-06-14 13:16:08,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2355, PETRI_PLACES=185, PETRI_TRANSITIONS=209} [2024-06-14 13:16:08,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 13:16:08,652 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 209 transitions, 2355 flow [2024-06-14 13:16:08,652 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 13:16:08,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:08,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:16:08,652 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 13:16:08,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 713479424, now seen corresponding path program 3 times [2024-06-14 13:16:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528553016] [2024-06-14 13:16:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528553016] [2024-06-14 13:16:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528553016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:10,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194836000] [2024-06-14 13:16:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:10,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:10,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:10,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 209 transitions, 2355 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 13:16:10,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:10,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:10,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:12,149 INFO L124 PetriNetUnfolderBase]: 2059/3415 cut-off events. [2024-06-14 13:16:12,150 INFO L125 PetriNetUnfolderBase]: For 131287/131289 co-relation queries the response was YES. [2024-06-14 13:16:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3415 events. 2059/3415 cut-off events. For 131287/131289 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19935 event pairs, 478 based on Foata normal form. 2/3416 useless extension candidates. Maximal degree in co-relation 20244. Up to 3157 conditions per place. [2024-06-14 13:16:12,174 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 29 changer transitions 0/234 dead transitions. [2024-06-14 13:16:12,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 234 transitions, 2969 flow [2024-06-14 13:16:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:16:12,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:16:12,176 INFO L175 Difference]: Start difference. First operand has 185 places, 209 transitions, 2355 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:16:12,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 234 transitions, 2969 flow [2024-06-14 13:16:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 234 transitions, 2859 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:12,326 INFO L231 Difference]: Finished difference. Result has 187 places, 209 transitions, 2309 flow [2024-06-14 13:16:12,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2309, PETRI_PLACES=187, PETRI_TRANSITIONS=209} [2024-06-14 13:16:12,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:16:12,327 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 209 transitions, 2309 flow [2024-06-14 13:16:12,327 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 13:16:12,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:12,327 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 13:16:12,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:16:12,327 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 13:16:12,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash 713479238, now seen corresponding path program 3 times [2024-06-14 13:16:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143632117] [2024-06-14 13:16:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:14,102 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 13:16:14,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:14,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143632117] [2024-06-14 13:16:14,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143632117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:14,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:14,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:16:14,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822135368] [2024-06-14 13:16:14,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:14,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:16:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:16:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:16:14,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:14,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 209 transitions, 2309 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:14,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:14,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:14,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:15,248 INFO L124 PetriNetUnfolderBase]: 2056/3411 cut-off events. [2024-06-14 13:16:15,249 INFO L125 PetriNetUnfolderBase]: For 134390/134392 co-relation queries the response was YES. [2024-06-14 13:16:15,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20279 conditions, 3411 events. 2056/3411 cut-off events. For 134390/134392 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19932 event pairs, 485 based on Foata normal form. 1/3411 useless extension candidates. Maximal degree in co-relation 20187. Up to 3192 conditions per place. [2024-06-14 13:16:15,280 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 19 changer transitions 0/228 dead transitions. [2024-06-14 13:16:15,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 228 transitions, 2809 flow [2024-06-14 13:16:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:16:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:16:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:16:15,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:16:15,281 INFO L175 Difference]: Start difference. First operand has 187 places, 209 transitions, 2309 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:16:15,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 228 transitions, 2809 flow [2024-06-14 13:16:15,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 228 transitions, 2733 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:15,468 INFO L231 Difference]: Finished difference. Result has 188 places, 209 transitions, 2281 flow [2024-06-14 13:16:15,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=188, PETRI_TRANSITIONS=209} [2024-06-14 13:16:15,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 13:16:15,469 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 209 transitions, 2281 flow [2024-06-14 13:16:15,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:15,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:15,469 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 13:16:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:16:15,469 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 13:16:15,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash 713725502, now seen corresponding path program 1 times [2024-06-14 13:16:15,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:15,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291643832] [2024-06-14 13:16:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:15,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291643832] [2024-06-14 13:16:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291643832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:18,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:18,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:18,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307941855] [2024-06-14 13:16:18,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:18,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:16:18,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 209 transitions, 2281 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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 13:16:18,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:18,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:16:18,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:20,114 INFO L124 PetriNetUnfolderBase]: 1908/3216 cut-off events. [2024-06-14 13:16:20,114 INFO L125 PetriNetUnfolderBase]: For 138151/138162 co-relation queries the response was YES. [2024-06-14 13:16:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 3216 events. 1908/3216 cut-off events. For 138151/138162 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19114 event pairs, 450 based on Foata normal form. 11/3200 useless extension candidates. Maximal degree in co-relation 19316. Up to 2946 conditions per place. [2024-06-14 13:16:20,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 194 selfloop transitions, 15 changer transitions 0/226 dead transitions. [2024-06-14 13:16:20,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 226 transitions, 2788 flow [2024-06-14 13:16:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:16:20,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:16:20,145 INFO L175 Difference]: Start difference. First operand has 188 places, 209 transitions, 2281 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:16:20,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 226 transitions, 2788 flow [2024-06-14 13:16:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 226 transitions, 2740 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:20,320 INFO L231 Difference]: Finished difference. Result has 191 places, 213 transitions, 2334 flow [2024-06-14 13:16:20,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=191, PETRI_TRANSITIONS=213} [2024-06-14 13:16:20,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 13:16:20,321 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 213 transitions, 2334 flow [2024-06-14 13:16:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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 13:16:20,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:20,322 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 13:16:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:16:20,322 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 13:16:20,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 884969036, now seen corresponding path program 1 times [2024-06-14 13:16:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643909682] [2024-06-14 13:16:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643909682] [2024-06-14 13:16:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643909682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837059503] [2024-06-14 13:16:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:23,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:23,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 213 transitions, 2334 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 13:16:23,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:23,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:25,075 INFO L124 PetriNetUnfolderBase]: 2064/3424 cut-off events. [2024-06-14 13:16:25,075 INFO L125 PetriNetUnfolderBase]: For 139208/139214 co-relation queries the response was YES. [2024-06-14 13:16:25,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 3424 events. 2064/3424 cut-off events. For 139208/139214 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20029 event pairs, 477 based on Foata normal form. 7/3429 useless extension candidates. Maximal degree in co-relation 20378. Up to 3064 conditions per place. [2024-06-14 13:16:25,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 193 selfloop transitions, 51 changer transitions 0/249 dead transitions. [2024-06-14 13:16:25,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 249 transitions, 3252 flow [2024-06-14 13:16:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:16:25,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:16:25,108 INFO L175 Difference]: Start difference. First operand has 191 places, 213 transitions, 2334 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:16:25,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 249 transitions, 3252 flow [2024-06-14 13:16:25,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 249 transitions, 3185 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:25,291 INFO L231 Difference]: Finished difference. Result has 194 places, 222 transitions, 2569 flow [2024-06-14 13:16:25,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=194, PETRI_TRANSITIONS=222} [2024-06-14 13:16:25,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 13:16:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 222 transitions, 2569 flow [2024-06-14 13:16:25,292 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 13:16:25,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:25,292 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 13:16:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:16:25,292 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 13:16:25,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash 74005990, now seen corresponding path program 2 times [2024-06-14 13:16:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:25,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098227345] [2024-06-14 13:16:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:28,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:28,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098227345] [2024-06-14 13:16:28,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098227345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:28,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:28,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299998101] [2024-06-14 13:16:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:28,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:28,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 222 transitions, 2569 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 13:16:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:29,788 INFO L124 PetriNetUnfolderBase]: 2087/3462 cut-off events. [2024-06-14 13:16:29,788 INFO L125 PetriNetUnfolderBase]: For 147993/147995 co-relation queries the response was YES. [2024-06-14 13:16:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21523 conditions, 3462 events. 2087/3462 cut-off events. For 147993/147995 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20276 event pairs, 472 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21428. Up to 3148 conditions per place. [2024-06-14 13:16:29,820 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 54 changer transitions 0/255 dead transitions. [2024-06-14 13:16:29,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 255 transitions, 3408 flow [2024-06-14 13:16:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:16:29,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:16:29,821 INFO L175 Difference]: Start difference. First operand has 194 places, 222 transitions, 2569 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:16:29,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 255 transitions, 3408 flow [2024-06-14 13:16:30,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 255 transitions, 3303 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 13:16:30,053 INFO L231 Difference]: Finished difference. Result has 201 places, 234 transitions, 2803 flow [2024-06-14 13:16:30,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2803, PETRI_PLACES=201, PETRI_TRANSITIONS=234} [2024-06-14 13:16:30,054 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:16:30,054 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 234 transitions, 2803 flow [2024-06-14 13:16:30,054 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 13:16:30,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:30,054 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 13:16:30,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:16:30,055 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 13:16:30,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -206291296, now seen corresponding path program 3 times [2024-06-14 13:16:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:30,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23629781] [2024-06-14 13:16:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:30,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:32,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:32,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23629781] [2024-06-14 13:16:32,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23629781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:32,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:32,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:32,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752750477] [2024-06-14 13:16:32,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:32,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:32,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:32,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:32,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 234 transitions, 2803 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 13:16:32,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:32,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:32,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:34,355 INFO L124 PetriNetUnfolderBase]: 2092/3462 cut-off events. [2024-06-14 13:16:34,355 INFO L125 PetriNetUnfolderBase]: For 154134/154146 co-relation queries the response was YES. [2024-06-14 13:16:34,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21618 conditions, 3462 events. 2092/3462 cut-off events. For 154134/154146 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20280 event pairs, 494 based on Foata normal form. 13/3472 useless extension candidates. Maximal degree in co-relation 21520. Up to 3095 conditions per place. [2024-06-14 13:16:34,391 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 62 changer transitions 0/264 dead transitions. [2024-06-14 13:16:34,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 264 transitions, 3817 flow [2024-06-14 13:16:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:16:34,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:16:34,393 INFO L175 Difference]: Start difference. First operand has 201 places, 234 transitions, 2803 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:16:34,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 264 transitions, 3817 flow [2024-06-14 13:16:34,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 264 transitions, 3677 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:34,588 INFO L231 Difference]: Finished difference. Result has 203 places, 240 transitions, 2927 flow [2024-06-14 13:16:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2927, PETRI_PLACES=203, PETRI_TRANSITIONS=240} [2024-06-14 13:16:34,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 13:16:34,589 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 240 transitions, 2927 flow [2024-06-14 13:16:34,589 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 13:16:34,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:34,590 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 13:16:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:16:34,590 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 13:16:34,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -205963006, now seen corresponding path program 4 times [2024-06-14 13:16:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730904801] [2024-06-14 13:16:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730904801] [2024-06-14 13:16:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730904801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:37,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360430285] [2024-06-14 13:16:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:37,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:37,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 240 transitions, 2927 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 13:16:37,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:37,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:38,567 INFO L124 PetriNetUnfolderBase]: 2097/3469 cut-off events. [2024-06-14 13:16:38,568 INFO L125 PetriNetUnfolderBase]: For 160668/160680 co-relation queries the response was YES. [2024-06-14 13:16:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21876 conditions, 3469 events. 2097/3469 cut-off events. For 160668/160680 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20311 event pairs, 494 based on Foata normal form. 13/3479 useless extension candidates. Maximal degree in co-relation 21777. Up to 3099 conditions per place. [2024-06-14 13:16:38,605 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 192 selfloop transitions, 65 changer transitions 0/262 dead transitions. [2024-06-14 13:16:38,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 262 transitions, 3769 flow [2024-06-14 13:16:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:16:38,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:16:38,607 INFO L175 Difference]: Start difference. First operand has 203 places, 240 transitions, 2927 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:16:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 262 transitions, 3769 flow [2024-06-14 13:16:38,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 262 transitions, 3635 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:38,842 INFO L231 Difference]: Finished difference. Result has 207 places, 243 transitions, 3001 flow [2024-06-14 13:16:38,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3001, PETRI_PLACES=207, PETRI_TRANSITIONS=243} [2024-06-14 13:16:38,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 13:16:38,843 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 243 transitions, 3001 flow [2024-06-14 13:16:38,843 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 13:16:38,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:38,843 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 13:16:38,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:16:38,843 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 13:16:38,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash -798663804, now seen corresponding path program 5 times [2024-06-14 13:16:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:38,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62006491] [2024-06-14 13:16:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:38,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62006491] [2024-06-14 13:16:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62006491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196862857] [2024-06-14 13:16:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:41,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 243 transitions, 3001 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 13:16:41,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:41,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:43,219 INFO L124 PetriNetUnfolderBase]: 2102/3481 cut-off events. [2024-06-14 13:16:43,219 INFO L125 PetriNetUnfolderBase]: For 164294/164296 co-relation queries the response was YES. [2024-06-14 13:16:43,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22059 conditions, 3481 events. 2102/3481 cut-off events. For 164294/164296 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20353 event pairs, 473 based on Foata normal form. 1/3481 useless extension candidates. Maximal degree in co-relation 21958. Up to 3013 conditions per place. [2024-06-14 13:16:43,252 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 99 changer transitions 0/278 dead transitions. [2024-06-14 13:16:43,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 278 transitions, 3796 flow [2024-06-14 13:16:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:16:43,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:16:43,255 INFO L175 Difference]: Start difference. First operand has 207 places, 243 transitions, 3001 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:16:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 278 transitions, 3796 flow [2024-06-14 13:16:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 278 transitions, 3618 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:43,464 INFO L231 Difference]: Finished difference. Result has 212 places, 246 transitions, 3167 flow [2024-06-14 13:16:43,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3167, PETRI_PLACES=212, PETRI_TRANSITIONS=246} [2024-06-14 13:16:43,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 13:16:43,465 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 246 transitions, 3167 flow [2024-06-14 13:16:43,466 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 13:16:43,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:43,466 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 13:16:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:16:43,466 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 13:16:43,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash 975481558, now seen corresponding path program 6 times [2024-06-14 13:16:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:43,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226924717] [2024-06-14 13:16:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:46,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226924717] [2024-06-14 13:16:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226924717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:46,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959260952] [2024-06-14 13:16:46,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:46,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:46,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:46,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 246 transitions, 3167 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 13:16:46,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:46,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:46,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:47,420 INFO L124 PetriNetUnfolderBase]: 2099/3476 cut-off events. [2024-06-14 13:16:47,421 INFO L125 PetriNetUnfolderBase]: For 170480/170486 co-relation queries the response was YES. [2024-06-14 13:16:47,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22336 conditions, 3476 events. 2099/3476 cut-off events. For 170480/170486 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20313 event pairs, 491 based on Foata normal form. 2/3476 useless extension candidates. Maximal degree in co-relation 22233. Up to 3011 conditions per place. [2024-06-14 13:16:47,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 167 selfloop transitions, 98 changer transitions 0/270 dead transitions. [2024-06-14 13:16:47,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 270 transitions, 3867 flow [2024-06-14 13:16:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:16:47,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 13:16:47,456 INFO L175 Difference]: Start difference. First operand has 212 places, 246 transitions, 3167 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:16:47,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 270 transitions, 3867 flow [2024-06-14 13:16:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 3668 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:47,675 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 3176 flow [2024-06-14 13:16:47,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3176, PETRI_PLACES=213, PETRI_TRANSITIONS=246} [2024-06-14 13:16:47,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 13:16:47,676 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 3176 flow [2024-06-14 13:16:47,676 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 13:16:47,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:47,676 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 13:16:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:16:47,677 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 13:16:47,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2088795721, now seen corresponding path program 1 times [2024-06-14 13:16:47,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699319576] [2024-06-14 13:16:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699319576] [2024-06-14 13:16:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699319576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:49,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842256248] [2024-06-14 13:16:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:49,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:49,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 246 transitions, 3176 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 13:16:49,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:49,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:49,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:51,341 INFO L124 PetriNetUnfolderBase]: 2109/3496 cut-off events. [2024-06-14 13:16:51,341 INFO L125 PetriNetUnfolderBase]: For 172082/172086 co-relation queries the response was YES. [2024-06-14 13:16:51,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22443 conditions, 3496 events. 2109/3496 cut-off events. For 172082/172086 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20516 event pairs, 489 based on Foata normal form. 4/3499 useless extension candidates. Maximal degree in co-relation 22339. Up to 3195 conditions per place. [2024-06-14 13:16:51,376 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 41 changer transitions 0/268 dead transitions. [2024-06-14 13:16:51,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 268 transitions, 3891 flow [2024-06-14 13:16:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:16:51,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:16:51,377 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 3176 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:16:51,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 268 transitions, 3891 flow [2024-06-14 13:16:51,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 268 transitions, 3708 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:51,670 INFO L231 Difference]: Finished difference. Result has 214 places, 249 transitions, 3118 flow [2024-06-14 13:16:51,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3118, PETRI_PLACES=214, PETRI_TRANSITIONS=249} [2024-06-14 13:16:51,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 13:16:51,671 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 249 transitions, 3118 flow [2024-06-14 13:16:51,671 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 13:16:51,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:51,671 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 13:16:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:16:51,671 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 13:16:51,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 98305207, now seen corresponding path program 2 times [2024-06-14 13:16:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:51,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218031057] [2024-06-14 13:16:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218031057] [2024-06-14 13:16:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218031057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:54,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355210797] [2024-06-14 13:16:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:54,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:54,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:54,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 249 transitions, 3118 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 13:16:54,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:54,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:54,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:56,227 INFO L124 PetriNetUnfolderBase]: 2119/3505 cut-off events. [2024-06-14 13:16:56,227 INFO L125 PetriNetUnfolderBase]: For 177397/177399 co-relation queries the response was YES. [2024-06-14 13:16:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22488 conditions, 3505 events. 2119/3505 cut-off events. For 177397/177399 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20562 event pairs, 489 based on Foata normal form. 2/3505 useless extension candidates. Maximal degree in co-relation 22383. Up to 3205 conditions per place. [2024-06-14 13:16:56,264 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 224 selfloop transitions, 48 changer transitions 0/277 dead transitions. [2024-06-14 13:16:56,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 3977 flow [2024-06-14 13:16:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:16:56,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:16:56,266 INFO L175 Difference]: Start difference. First operand has 214 places, 249 transitions, 3118 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:16:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 3977 flow [2024-06-14 13:16:56,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 277 transitions, 3854 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:56,565 INFO L231 Difference]: Finished difference. Result has 219 places, 252 transitions, 3140 flow [2024-06-14 13:16:56,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3140, PETRI_PLACES=219, PETRI_TRANSITIONS=252} [2024-06-14 13:16:56,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:16:56,565 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 252 transitions, 3140 flow [2024-06-14 13:16:56,566 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 13:16:56,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:56,566 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 13:16:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:16:56,566 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 13:16:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2092514791, now seen corresponding path program 3 times [2024-06-14 13:16:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001187154] [2024-06-14 13:16:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:59,039 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 13:16:59,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001187154] [2024-06-14 13:16:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001187154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:59,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:59,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904634915] [2024-06-14 13:16:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:59,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:59,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:59,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 252 transitions, 3140 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 13:16:59,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:59,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:59,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:00,851 INFO L124 PetriNetUnfolderBase]: 2113/3497 cut-off events. [2024-06-14 13:17:00,851 INFO L125 PetriNetUnfolderBase]: For 180191/180193 co-relation queries the response was YES. [2024-06-14 13:17:00,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22428 conditions, 3497 events. 2113/3497 cut-off events. For 180191/180193 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20502 event pairs, 488 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 22323. Up to 3200 conditions per place. [2024-06-14 13:17:00,882 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 47 changer transitions 0/274 dead transitions. [2024-06-14 13:17:00,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 3840 flow [2024-06-14 13:17:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:17:00,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:17:00,884 INFO L175 Difference]: Start difference. First operand has 219 places, 252 transitions, 3140 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:17:00,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 3840 flow [2024-06-14 13:17:01,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 274 transitions, 3661 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 13:17:01,180 INFO L231 Difference]: Finished difference. Result has 217 places, 252 transitions, 3061 flow [2024-06-14 13:17:01,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3061, PETRI_PLACES=217, PETRI_TRANSITIONS=252} [2024-06-14 13:17:01,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 13:17:01,180 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 252 transitions, 3061 flow [2024-06-14 13:17:01,180 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 13:17:01,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:01,180 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] [2024-06-14 13:17:01,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:17:01,181 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 13:17:01,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 650379319, now seen corresponding path program 4 times [2024-06-14 13:17:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:01,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748675311] [2024-06-14 13:17:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:03,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748675311] [2024-06-14 13:17:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748675311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417113613] [2024-06-14 13:17:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:03,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:03,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 252 transitions, 3061 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 13:17:03,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:03,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:03,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:04,679 INFO L124 PetriNetUnfolderBase]: 2123/3515 cut-off events. [2024-06-14 13:17:04,679 INFO L125 PetriNetUnfolderBase]: For 185663/185665 co-relation queries the response was YES. [2024-06-14 13:17:04,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22465 conditions, 3515 events. 2123/3515 cut-off events. For 185663/185665 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20599 event pairs, 475 based on Foata normal form. 2/3516 useless extension candidates. Maximal degree in co-relation 22361. Up to 3245 conditions per place. [2024-06-14 13:17:04,715 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 237 selfloop transitions, 33 changer transitions 0/275 dead transitions. [2024-06-14 13:17:04,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 275 transitions, 3795 flow [2024-06-14 13:17:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:17:04,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:17:04,716 INFO L175 Difference]: Start difference. First operand has 217 places, 252 transitions, 3061 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:17:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 275 transitions, 3795 flow [2024-06-14 13:17:04,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 275 transitions, 3695 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:04,960 INFO L231 Difference]: Finished difference. Result has 218 places, 255 transitions, 3068 flow [2024-06-14 13:17:04,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3068, PETRI_PLACES=218, PETRI_TRANSITIONS=255} [2024-06-14 13:17:04,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 13:17:04,961 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 255 transitions, 3068 flow [2024-06-14 13:17:04,962 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 13:17:04,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:04,962 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 13:17:04,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:17:04,962 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 13:17:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash 643022089, now seen corresponding path program 5 times [2024-06-14 13:17:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:04,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849133640] [2024-06-14 13:17:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:07,083 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 13:17:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849133640] [2024-06-14 13:17:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849133640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:07,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015572296] [2024-06-14 13:17:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:07,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:07,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 255 transitions, 3068 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 13:17:07,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:07,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:07,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:08,357 INFO L124 PetriNetUnfolderBase]: 2117/3505 cut-off events. [2024-06-14 13:17:08,357 INFO L125 PetriNetUnfolderBase]: For 188690/188692 co-relation queries the response was YES. [2024-06-14 13:17:08,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22378 conditions, 3505 events. 2117/3505 cut-off events. For 188690/188692 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20505 event pairs, 476 based on Foata normal form. 2/3506 useless extension candidates. Maximal degree in co-relation 22273. Up to 3240 conditions per place. [2024-06-14 13:17:08,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 240 selfloop transitions, 33 changer transitions 0/278 dead transitions. [2024-06-14 13:17:08,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 278 transitions, 3674 flow [2024-06-14 13:17:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:17:08,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:17:08,391 INFO L175 Difference]: Start difference. First operand has 218 places, 255 transitions, 3068 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:17:08,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 278 transitions, 3674 flow [2024-06-14 13:17:08,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 278 transitions, 3605 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:08,630 INFO L231 Difference]: Finished difference. Result has 220 places, 255 transitions, 3071 flow [2024-06-14 13:17:08,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=220, PETRI_TRANSITIONS=255} [2024-06-14 13:17:08,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 13:17:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 255 transitions, 3071 flow [2024-06-14 13:17:08,631 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 13:17:08,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:08,631 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 13:17:08,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:17:08,631 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 13:17:08,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2121011117, now seen corresponding path program 1 times [2024-06-14 13:17:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:08,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999511193] [2024-06-14 13:17:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:08,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:12,162 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 13:17:12,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999511193] [2024-06-14 13:17:12,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999511193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:12,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:12,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833571120] [2024-06-14 13:17:12,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:12,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:12,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:12,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 255 transitions, 3071 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 13:17:12,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:12,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:12,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:13,516 INFO L124 PetriNetUnfolderBase]: 2130/3526 cut-off events. [2024-06-14 13:17:13,516 INFO L125 PetriNetUnfolderBase]: For 194610/194616 co-relation queries the response was YES. [2024-06-14 13:17:13,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22680 conditions, 3526 events. 2130/3526 cut-off events. For 194610/194616 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20699 event pairs, 463 based on Foata normal form. 7/3532 useless extension candidates. Maximal degree in co-relation 22574. Up to 3149 conditions per place. [2024-06-14 13:17:13,554 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 222 selfloop transitions, 72 changer transitions 0/299 dead transitions. [2024-06-14 13:17:13,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 299 transitions, 3979 flow [2024-06-14 13:17:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:17:13,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:17:13,556 INFO L175 Difference]: Start difference. First operand has 220 places, 255 transitions, 3071 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:17:13,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 299 transitions, 3979 flow [2024-06-14 13:17:13,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 299 transitions, 3879 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:13,819 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 3248 flow [2024-06-14 13:17:13,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3248, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-14 13:17:13,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 13:17:13,820 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 3248 flow [2024-06-14 13:17:13,820 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 13:17:13,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:13,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:17:13,821 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 13:17:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1664118375, now seen corresponding path program 1 times [2024-06-14 13:17:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:13,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166120156] [2024-06-14 13:17:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:13,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:17,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166120156] [2024-06-14 13:17:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166120156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66556430] [2024-06-14 13:17:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:17,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 3248 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 13:17:17,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:17,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:17,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:18,876 INFO L124 PetriNetUnfolderBase]: 2151/3558 cut-off events. [2024-06-14 13:17:18,877 INFO L125 PetriNetUnfolderBase]: For 208147/208153 co-relation queries the response was YES. [2024-06-14 13:17:18,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23769 conditions, 3558 events. 2151/3558 cut-off events. For 208147/208153 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20895 event pairs, 478 based on Foata normal form. 7/3563 useless extension candidates. Maximal degree in co-relation 23661. Up to 3172 conditions per place. [2024-06-14 13:17:18,914 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 74 changer transitions 0/296 dead transitions. [2024-06-14 13:17:18,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 296 transitions, 4298 flow [2024-06-14 13:17:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:17:18,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:17:18,916 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 3248 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:17:18,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 296 transitions, 4298 flow [2024-06-14 13:17:19,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 296 transitions, 4183 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:19,299 INFO L231 Difference]: Finished difference. Result has 225 places, 270 transitions, 3447 flow [2024-06-14 13:17:19,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3447, PETRI_PLACES=225, PETRI_TRANSITIONS=270} [2024-06-14 13:17:19,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 13:17:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 270 transitions, 3447 flow [2024-06-14 13:17:19,300 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 13:17:19,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:19,300 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 13:17:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:17:19,300 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 13:17:19,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 591136633, now seen corresponding path program 2 times [2024-06-14 13:17:19,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:19,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098708199] [2024-06-14 13:17:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:22,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:22,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098708199] [2024-06-14 13:17:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098708199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151372248] [2024-06-14 13:17:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:22,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:22,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:22,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 270 transitions, 3447 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 13:17:22,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:22,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:22,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:24,396 INFO L124 PetriNetUnfolderBase]: 2164/3573 cut-off events. [2024-06-14 13:17:24,396 INFO L125 PetriNetUnfolderBase]: For 217312/217314 co-relation queries the response was YES. [2024-06-14 13:17:24,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24232 conditions, 3573 events. 2164/3573 cut-off events. For 217312/217314 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20972 event pairs, 486 based on Foata normal form. 1/3571 useless extension candidates. Maximal degree in co-relation 24122. Up to 2928 conditions per place. [2024-06-14 13:17:24,434 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 175 selfloop transitions, 129 changer transitions 0/309 dead transitions. [2024-06-14 13:17:24,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 309 transitions, 4573 flow [2024-06-14 13:17:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:17:24,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:17:24,436 INFO L175 Difference]: Start difference. First operand has 225 places, 270 transitions, 3447 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:17:24,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 309 transitions, 4573 flow [2024-06-14 13:17:24,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 309 transitions, 4446 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:24,737 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3870 flow [2024-06-14 13:17:24,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3870, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-14 13:17:24,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 13:17:24,738 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3870 flow [2024-06-14 13:17:24,738 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 13:17:24,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:24,738 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 13:17:24,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:17:24,739 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 13:17:24,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2005421231, now seen corresponding path program 2 times [2024-06-14 13:17:24,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:24,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414403256] [2024-06-14 13:17:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:24,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:28,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414403256] [2024-06-14 13:17:28,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414403256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:28,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852582735] [2024-06-14 13:17:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:28,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:28,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3870 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 13:17:28,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:28,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:28,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:29,969 INFO L124 PetriNetUnfolderBase]: 2169/3587 cut-off events. [2024-06-14 13:17:29,970 INFO L125 PetriNetUnfolderBase]: For 229059/229065 co-relation queries the response was YES. [2024-06-14 13:17:29,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25406 conditions, 3587 events. 2169/3587 cut-off events. For 229059/229065 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21137 event pairs, 478 based on Foata normal form. 7/3592 useless extension candidates. Maximal degree in co-relation 25293. Up to 3196 conditions per place. [2024-06-14 13:17:30,008 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 225 selfloop transitions, 78 changer transitions 0/308 dead transitions. [2024-06-14 13:17:30,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 308 transitions, 4726 flow [2024-06-14 13:17:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:17:30,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:17:30,009 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3870 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:17:30,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 308 transitions, 4726 flow [2024-06-14 13:17:30,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 308 transitions, 4572 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:30,402 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3932 flow [2024-06-14 13:17:30,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3932, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-14 13:17:30,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 13:17:30,402 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3932 flow [2024-06-14 13:17:30,402 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 13:17:30,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:30,403 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 13:17:30,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:17:30,403 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 13:17:30,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -174986887, now seen corresponding path program 1 times [2024-06-14 13:17:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348054297] [2024-06-14 13:17:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348054297] [2024-06-14 13:17:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348054297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:33,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542485908] [2024-06-14 13:17:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:33,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:33,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3932 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 13:17:33,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:33,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:35,279 INFO L124 PetriNetUnfolderBase]: 2227/3667 cut-off events. [2024-06-14 13:17:35,279 INFO L125 PetriNetUnfolderBase]: For 247149/247155 co-relation queries the response was YES. [2024-06-14 13:17:35,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25900 conditions, 3667 events. 2227/3667 cut-off events. For 247149/247155 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21511 event pairs, 482 based on Foata normal form. 8/3673 useless extension candidates. Maximal degree in co-relation 25785. Up to 3182 conditions per place. [2024-06-14 13:17:35,317 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 233 selfloop transitions, 91 changer transitions 0/329 dead transitions. [2024-06-14 13:17:35,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 329 transitions, 5238 flow [2024-06-14 13:17:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:17:35,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:17:35,319 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3932 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:17:35,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 329 transitions, 5238 flow [2024-06-14 13:17:35,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 5058 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:35,758 INFO L231 Difference]: Finished difference. Result has 243 places, 295 transitions, 4153 flow [2024-06-14 13:17:35,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4153, PETRI_PLACES=243, PETRI_TRANSITIONS=295} [2024-06-14 13:17:35,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 13:17:35,759 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 295 transitions, 4153 flow [2024-06-14 13:17:35,759 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 13:17:35,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:35,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:35,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:17:35,759 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 13:17:35,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2005421417, now seen corresponding path program 3 times [2024-06-14 13:17:35,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:35,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173158716] [2024-06-14 13:17:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:39,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:39,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173158716] [2024-06-14 13:17:39,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173158716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:39,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:39,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:39,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117739525] [2024-06-14 13:17:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:39,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:39,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:39,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 295 transitions, 4153 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 13:17:39,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:39,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:39,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:41,158 INFO L124 PetriNetUnfolderBase]: 2232/3671 cut-off events. [2024-06-14 13:17:41,158 INFO L125 PetriNetUnfolderBase]: For 256389/256391 co-relation queries the response was YES. [2024-06-14 13:17:41,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26631 conditions, 3671 events. 2232/3671 cut-off events. For 256389/256391 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21510 event pairs, 497 based on Foata normal form. 1/3669 useless extension candidates. Maximal degree in co-relation 26513. Up to 3016 conditions per place. [2024-06-14 13:17:41,202 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 134 changer transitions 0/324 dead transitions. [2024-06-14 13:17:41,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 324 transitions, 5197 flow [2024-06-14 13:17:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:17:41,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:17:41,204 INFO L175 Difference]: Start difference. First operand has 243 places, 295 transitions, 4153 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:17:41,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 324 transitions, 5197 flow [2024-06-14 13:17:41,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 324 transitions, 5020 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:41,716 INFO L231 Difference]: Finished difference. Result has 246 places, 298 transitions, 4302 flow [2024-06-14 13:17:41,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4302, PETRI_PLACES=246, PETRI_TRANSITIONS=298} [2024-06-14 13:17:41,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:17:41,717 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 298 transitions, 4302 flow [2024-06-14 13:17:41,717 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 13:17:41,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:41,717 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 13:17:41,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:17:41,717 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 13:17:41,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1268510169, now seen corresponding path program 2 times [2024-06-14 13:17:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:41,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893254325] [2024-06-14 13:17:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893254325] [2024-06-14 13:17:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893254325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:45,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363736448] [2024-06-14 13:17:45,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:45,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:45,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 298 transitions, 4302 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 13:17:45,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:45,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:45,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:46,811 INFO L124 PetriNetUnfolderBase]: 2316/3798 cut-off events. [2024-06-14 13:17:46,812 INFO L125 PetriNetUnfolderBase]: For 284733/284735 co-relation queries the response was YES. [2024-06-14 13:17:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28306 conditions, 3798 events. 2316/3798 cut-off events. For 284733/284735 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22257 event pairs, 475 based on Foata normal form. 4/3801 useless extension candidates. Maximal degree in co-relation 28186. Up to 3351 conditions per place. [2024-06-14 13:17:46,849 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 265 selfloop transitions, 75 changer transitions 0/345 dead transitions. [2024-06-14 13:17:46,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 345 transitions, 5616 flow [2024-06-14 13:17:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:17:46,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-14 13:17:46,851 INFO L175 Difference]: Start difference. First operand has 246 places, 298 transitions, 4302 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:17:46,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 345 transitions, 5616 flow [2024-06-14 13:17:47,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 345 transitions, 5355 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:47,347 INFO L231 Difference]: Finished difference. Result has 253 places, 312 transitions, 4440 flow [2024-06-14 13:17:47,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4440, PETRI_PLACES=253, PETRI_TRANSITIONS=312} [2024-06-14 13:17:47,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 13:17:47,348 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 312 transitions, 4440 flow [2024-06-14 13:17:47,348 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 13:17:47,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:47,348 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 13:17:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:17:47,348 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 13:17:47,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1841369865, now seen corresponding path program 3 times [2024-06-14 13:17:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:47,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613715658] [2024-06-14 13:17:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613715658] [2024-06-14 13:17:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613715658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:50,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797365400] [2024-06-14 13:17:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:50,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:50,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 312 transitions, 4440 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 13:17:50,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:50,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:50,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:51,730 INFO L124 PetriNetUnfolderBase]: 2313/3790 cut-off events. [2024-06-14 13:17:51,730 INFO L125 PetriNetUnfolderBase]: For 288029/288031 co-relation queries the response was YES. [2024-06-14 13:17:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28738 conditions, 3790 events. 2313/3790 cut-off events. For 288029/288031 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22138 event pairs, 485 based on Foata normal form. 1/3790 useless extension candidates. Maximal degree in co-relation 28616. Up to 3463 conditions per place. [2024-06-14 13:17:51,770 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 54 changer transitions 0/332 dead transitions. [2024-06-14 13:17:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 332 transitions, 5161 flow [2024-06-14 13:17:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:17:51,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 13:17:51,772 INFO L175 Difference]: Start difference. First operand has 253 places, 312 transitions, 4440 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:17:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 332 transitions, 5161 flow [2024-06-14 13:17:52,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 332 transitions, 4960 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:52,300 INFO L231 Difference]: Finished difference. Result has 254 places, 312 transitions, 4361 flow [2024-06-14 13:17:52,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4361, PETRI_PLACES=254, PETRI_TRANSITIONS=312} [2024-06-14 13:17:52,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 13:17:52,301 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 312 transitions, 4361 flow [2024-06-14 13:17:52,301 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 13:17:52,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:52,301 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 13:17:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:17:52,301 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 13:17:52,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -68534393, now seen corresponding path program 3 times [2024-06-14 13:17:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192276149] [2024-06-14 13:17:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:56,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192276149] [2024-06-14 13:17:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192276149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:56,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:56,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089720643] [2024-06-14 13:17:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:56,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:56,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 312 transitions, 4361 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 13:17:56,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:56,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:56,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:58,310 INFO L124 PetriNetUnfolderBase]: 2301/3774 cut-off events. [2024-06-14 13:17:58,310 INFO L125 PetriNetUnfolderBase]: For 294076/294078 co-relation queries the response was YES. [2024-06-14 13:17:58,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28339 conditions, 3774 events. 2301/3774 cut-off events. For 294076/294078 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22036 event pairs, 474 based on Foata normal form. 4/3777 useless extension candidates. Maximal degree in co-relation 28215. Up to 3343 conditions per place. [2024-06-14 13:17:58,349 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 263 selfloop transitions, 79 changer transitions 0/347 dead transitions. [2024-06-14 13:17:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 347 transitions, 5384 flow [2024-06-14 13:17:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:17:58,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-14 13:17:58,351 INFO L175 Difference]: Start difference. First operand has 254 places, 312 transitions, 4361 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:17:58,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 347 transitions, 5384 flow [2024-06-14 13:17:58,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 347 transitions, 5276 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:58,884 INFO L231 Difference]: Finished difference. Result has 258 places, 316 transitions, 4524 flow [2024-06-14 13:17:58,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4524, PETRI_PLACES=258, PETRI_TRANSITIONS=316} [2024-06-14 13:17:58,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 13:17:58,885 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 316 transitions, 4524 flow [2024-06-14 13:17:58,885 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 13:17:58,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:58,885 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 13:17:58,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:17:58,885 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 13:17:58,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1841369679, now seen corresponding path program 4 times [2024-06-14 13:17:58,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:58,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303278037] [2024-06-14 13:17:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:58,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:02,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:02,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303278037] [2024-06-14 13:18:02,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303278037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:02,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:02,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:02,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712768224] [2024-06-14 13:18:02,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:02,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:02,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 316 transitions, 4524 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 13:18:02,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:03,827 INFO L124 PetriNetUnfolderBase]: 2314/3792 cut-off events. [2024-06-14 13:18:03,827 INFO L125 PetriNetUnfolderBase]: For 298799/298801 co-relation queries the response was YES. [2024-06-14 13:18:03,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28873 conditions, 3792 events. 2314/3792 cut-off events. For 298799/298801 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22188 event pairs, 481 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 28748. Up to 3456 conditions per place. [2024-06-14 13:18:03,872 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 59 changer transitions 0/344 dead transitions. [2024-06-14 13:18:03,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 344 transitions, 5511 flow [2024-06-14 13:18:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:18:03,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:18:03,874 INFO L175 Difference]: Start difference. First operand has 258 places, 316 transitions, 4524 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:18:03,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 344 transitions, 5511 flow [2024-06-14 13:18:04,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 344 transitions, 5291 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:04,597 INFO L231 Difference]: Finished difference. Result has 260 places, 322 transitions, 4561 flow [2024-06-14 13:18:04,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=260, PETRI_TRANSITIONS=322} [2024-06-14 13:18:04,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 13:18:04,598 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 322 transitions, 4561 flow [2024-06-14 13:18:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:04,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:04,598 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 13:18:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:18:04,598 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 13:18:04,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1841616129, now seen corresponding path program 1 times [2024-06-14 13:18:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:04,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016352121] [2024-06-14 13:18:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:08,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:08,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016352121] [2024-06-14 13:18:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016352121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:08,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730592335] [2024-06-14 13:18:08,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:08,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:08,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:08,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:08,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:18:08,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 322 transitions, 4561 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:08,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:08,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:18:08,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:10,469 INFO L124 PetriNetUnfolderBase]: 2226/3687 cut-off events. [2024-06-14 13:18:10,469 INFO L125 PetriNetUnfolderBase]: For 331717/331728 co-relation queries the response was YES. [2024-06-14 13:18:10,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28375 conditions, 3687 events. 2226/3687 cut-off events. For 331717/331728 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21929 event pairs, 455 based on Foata normal form. 21/3681 useless extension candidates. Maximal degree in co-relation 28248. Up to 3193 conditions per place. [2024-06-14 13:18:10,513 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 47 changer transitions 0/350 dead transitions. [2024-06-14 13:18:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 350 transitions, 5297 flow [2024-06-14 13:18:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:18:10,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:18:10,515 INFO L175 Difference]: Start difference. First operand has 260 places, 322 transitions, 4561 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:18:10,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 350 transitions, 5297 flow [2024-06-14 13:18:11,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 350 transitions, 5154 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:11,010 INFO L231 Difference]: Finished difference. Result has 263 places, 323 transitions, 4536 flow [2024-06-14 13:18:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4536, PETRI_PLACES=263, PETRI_TRANSITIONS=323} [2024-06-14 13:18:11,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 13:18:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 323 transitions, 4536 flow [2024-06-14 13:18:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:11,011 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 13:18:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:18:11,011 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 13:18:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 610219283, now seen corresponding path program 5 times [2024-06-14 13:18:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925515515] [2024-06-14 13:18:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925515515] [2024-06-14 13:18:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925515515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040669518] [2024-06-14 13:18:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:14,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:14,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 323 transitions, 4536 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 13:18:14,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:14,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:16,551 INFO L124 PetriNetUnfolderBase]: 2363/3853 cut-off events. [2024-06-14 13:18:16,552 INFO L125 PetriNetUnfolderBase]: For 318807/318813 co-relation queries the response was YES. [2024-06-14 13:18:16,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29441 conditions, 3853 events. 2363/3853 cut-off events. For 318807/318813 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22550 event pairs, 573 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 29313. Up to 3199 conditions per place. [2024-06-14 13:18:16,595 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 149 changer transitions 0/356 dead transitions. [2024-06-14 13:18:16,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 356 transitions, 5890 flow [2024-06-14 13:18:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:18:16,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:18:16,596 INFO L175 Difference]: Start difference. First operand has 263 places, 323 transitions, 4536 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:18:16,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 356 transitions, 5890 flow [2024-06-14 13:18:17,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 356 transitions, 5794 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:17,230 INFO L231 Difference]: Finished difference. Result has 264 places, 329 transitions, 4918 flow [2024-06-14 13:18:17,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4918, PETRI_PLACES=264, PETRI_TRANSITIONS=329} [2024-06-14 13:18:17,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 13:18:17,231 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 329 transitions, 4918 flow [2024-06-14 13:18:17,231 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 13:18:17,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:17,231 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 13:18:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:18:17,231 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 13:18:17,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1267513983, now seen corresponding path program 4 times [2024-06-14 13:18:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123974951] [2024-06-14 13:18:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:20,699 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 13:18:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123974951] [2024-06-14 13:18:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123974951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:20,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284492286] [2024-06-14 13:18:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:20,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:20,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 329 transitions, 4918 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 13:18:20,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:20,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:22,480 INFO L124 PetriNetUnfolderBase]: 2373/3882 cut-off events. [2024-06-14 13:18:22,481 INFO L125 PetriNetUnfolderBase]: For 331870/331882 co-relation queries the response was YES. [2024-06-14 13:18:22,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30033 conditions, 3882 events. 2373/3882 cut-off events. For 331870/331882 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22848 event pairs, 519 based on Foata normal form. 14/3893 useless extension candidates. Maximal degree in co-relation 29904. Up to 3470 conditions per place. [2024-06-14 13:18:22,522 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 86 changer transitions 0/362 dead transitions. [2024-06-14 13:18:22,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 6132 flow [2024-06-14 13:18:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:18:22,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:18:22,524 INFO L175 Difference]: Start difference. First operand has 264 places, 329 transitions, 4918 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:18:22,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 6132 flow [2024-06-14 13:18:23,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 362 transitions, 5868 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:23,241 INFO L231 Difference]: Finished difference. Result has 268 places, 335 transitions, 4986 flow [2024-06-14 13:18:23,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4986, PETRI_PLACES=268, PETRI_TRANSITIONS=335} [2024-06-14 13:18:23,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 13:18:23,242 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 335 transitions, 4986 flow [2024-06-14 13:18:23,242 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 13:18:23,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:23,242 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 13:18:23,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:18:23,243 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 13:18:23,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1073761367, now seen corresponding path program 4 times [2024-06-14 13:18:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72576025] [2024-06-14 13:18:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:25,980 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 13:18:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72576025] [2024-06-14 13:18:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72576025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:25,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:25,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847141017] [2024-06-14 13:18:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:25,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:25,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:26,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:26,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 335 transitions, 4986 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 13:18:26,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:26,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:26,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:27,604 INFO L124 PetriNetUnfolderBase]: 2378/3906 cut-off events. [2024-06-14 13:18:27,604 INFO L125 PetriNetUnfolderBase]: For 337245/337267 co-relation queries the response was YES. [2024-06-14 13:18:27,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30080 conditions, 3906 events. 2378/3906 cut-off events. For 337245/337267 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23141 event pairs, 519 based on Foata normal form. 23/3928 useless extension candidates. Maximal degree in co-relation 29950. Up to 3493 conditions per place. [2024-06-14 13:18:27,650 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-14 13:18:27,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 361 transitions, 6117 flow [2024-06-14 13:18:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:18:27,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:18:27,652 INFO L175 Difference]: Start difference. First operand has 268 places, 335 transitions, 4986 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:18:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 361 transitions, 6117 flow [2024-06-14 13:18:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 361 transitions, 5935 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:28,361 INFO L231 Difference]: Finished difference. Result has 270 places, 338 transitions, 5035 flow [2024-06-14 13:18:28,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5035, PETRI_PLACES=270, PETRI_TRANSITIONS=338} [2024-06-14 13:18:28,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-14 13:18:28,362 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 338 transitions, 5035 flow [2024-06-14 13:18:28,362 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 13:18:28,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:28,362 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] [2024-06-14 13:18:28,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:18:28,362 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 13:18:28,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1589240631, now seen corresponding path program 5 times [2024-06-14 13:18:28,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:28,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600719659] [2024-06-14 13:18:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:28,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600719659] [2024-06-14 13:18:31,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600719659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:31,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:31,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614845045] [2024-06-14 13:18:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:31,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:31,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:31,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 338 transitions, 5035 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 13:18:31,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:31,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:31,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:33,767 INFO L124 PetriNetUnfolderBase]: 2383/3902 cut-off events. [2024-06-14 13:18:33,767 INFO L125 PetriNetUnfolderBase]: For 344127/344139 co-relation queries the response was YES. [2024-06-14 13:18:33,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30280 conditions, 3902 events. 2383/3902 cut-off events. For 344127/344139 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22991 event pairs, 528 based on Foata normal form. 13/3912 useless extension candidates. Maximal degree in co-relation 30148. Up to 3499 conditions per place. [2024-06-14 13:18:33,813 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 86 changer transitions 0/364 dead transitions. [2024-06-14 13:18:33,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 364 transitions, 6031 flow [2024-06-14 13:18:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:18:33,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:18:33,814 INFO L175 Difference]: Start difference. First operand has 270 places, 338 transitions, 5035 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:18:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 364 transitions, 6031 flow [2024-06-14 13:18:34,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 364 transitions, 5716 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:34,425 INFO L231 Difference]: Finished difference. Result has 271 places, 341 transitions, 4966 flow [2024-06-14 13:18:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4966, PETRI_PLACES=271, PETRI_TRANSITIONS=341} [2024-06-14 13:18:34,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 13:18:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 341 transitions, 4966 flow [2024-06-14 13:18:34,425 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 13:18:34,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:34,425 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 13:18:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:18:34,426 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 13:18:34,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 566189379, now seen corresponding path program 6 times [2024-06-14 13:18:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:34,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854944921] [2024-06-14 13:18:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:34,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:37,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854944921] [2024-06-14 13:18:37,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854944921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:37,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:37,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351914966] [2024-06-14 13:18:37,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:37,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:37,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:37,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:37,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 341 transitions, 4966 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 13:18:37,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:37,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:37,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:38,771 INFO L124 PetriNetUnfolderBase]: 2388/3922 cut-off events. [2024-06-14 13:18:38,771 INFO L125 PetriNetUnfolderBase]: For 351225/351247 co-relation queries the response was YES. [2024-06-14 13:18:38,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30373 conditions, 3922 events. 2388/3922 cut-off events. For 351225/351247 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23231 event pairs, 527 based on Foata normal form. 23/3944 useless extension candidates. Maximal degree in co-relation 30242. Up to 3505 conditions per place. [2024-06-14 13:18:38,813 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 82 changer transitions 0/362 dead transitions. [2024-06-14 13:18:38,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 362 transitions, 5943 flow [2024-06-14 13:18:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:18:38,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:18:38,815 INFO L175 Difference]: Start difference. First operand has 271 places, 341 transitions, 4966 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:18:38,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 362 transitions, 5943 flow [2024-06-14 13:18:39,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 362 transitions, 5809 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:39,551 INFO L231 Difference]: Finished difference. Result has 273 places, 344 transitions, 5067 flow [2024-06-14 13:18:39,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5067, PETRI_PLACES=273, PETRI_TRANSITIONS=344} [2024-06-14 13:18:39,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 13:18:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 344 transitions, 5067 flow [2024-06-14 13:18:39,552 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 13:18:39,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:39,552 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 13:18:39,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:18:39,552 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 13:18:39,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1589240817, now seen corresponding path program 6 times [2024-06-14 13:18:39,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851341088] [2024-06-14 13:18:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:39,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:42,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:42,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851341088] [2024-06-14 13:18:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851341088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:42,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:42,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:42,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132815702] [2024-06-14 13:18:42,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:42,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:42,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:42,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:42,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 344 transitions, 5067 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 13:18:42,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:42,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:42,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:44,576 INFO L124 PetriNetUnfolderBase]: 2393/3894 cut-off events. [2024-06-14 13:18:44,576 INFO L125 PetriNetUnfolderBase]: For 362037/362043 co-relation queries the response was YES. [2024-06-14 13:18:44,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30519 conditions, 3894 events. 2393/3894 cut-off events. For 362037/362043 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22778 event pairs, 571 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 30386. Up to 3229 conditions per place. [2024-06-14 13:18:44,621 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 156 changer transitions 0/370 dead transitions. [2024-06-14 13:18:44,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 370 transitions, 6357 flow [2024-06-14 13:18:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:18:44,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:18:44,622 INFO L175 Difference]: Start difference. First operand has 273 places, 344 transitions, 5067 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:18:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 370 transitions, 6357 flow [2024-06-14 13:18:45,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 370 transitions, 6217 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:45,336 INFO L231 Difference]: Finished difference. Result has 277 places, 347 transitions, 5307 flow [2024-06-14 13:18:45,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5307, PETRI_PLACES=277, PETRI_TRANSITIONS=347} [2024-06-14 13:18:45,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 13:18:45,337 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 347 transitions, 5307 flow [2024-06-14 13:18:45,337 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 13:18:45,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:45,337 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 13:18:45,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:18:45,338 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 13:18:45,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1359300509, now seen corresponding path program 7 times [2024-06-14 13:18:45,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:45,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86168894] [2024-06-14 13:18:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:48,121 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 13:18:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86168894] [2024-06-14 13:18:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86168894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:48,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886371991] [2024-06-14 13:18:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:48,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 347 transitions, 5307 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 13:18:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:48,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:49,947 INFO L124 PetriNetUnfolderBase]: 2390/3913 cut-off events. [2024-06-14 13:18:49,947 INFO L125 PetriNetUnfolderBase]: For 368935/368947 co-relation queries the response was YES. [2024-06-14 13:18:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30823 conditions, 3913 events. 2390/3913 cut-off events. For 368935/368947 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23098 event pairs, 525 based on Foata normal form. 13/3923 useless extension candidates. Maximal degree in co-relation 30689. Up to 3509 conditions per place. [2024-06-14 13:18:49,990 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 89 changer transitions 0/367 dead transitions. [2024-06-14 13:18:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 367 transitions, 6385 flow [2024-06-14 13:18:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:18:49,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:18:49,992 INFO L175 Difference]: Start difference. First operand has 277 places, 347 transitions, 5307 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:18:49,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 367 transitions, 6385 flow [2024-06-14 13:18:50,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 367 transitions, 6048 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:50,719 INFO L231 Difference]: Finished difference. Result has 280 places, 347 transitions, 5154 flow [2024-06-14 13:18:50,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5154, PETRI_PLACES=280, PETRI_TRANSITIONS=347} [2024-06-14 13:18:50,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 13:18:50,720 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 347 transitions, 5154 flow [2024-06-14 13:18:50,720 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 13:18:50,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:50,721 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 13:18:50,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:18:50,721 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 13:18:50,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 443200079, now seen corresponding path program 7 times [2024-06-14 13:18:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:50,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299490852] [2024-06-14 13:18:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:53,801 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 13:18:53,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299490852] [2024-06-14 13:18:53,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299490852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:53,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27920148] [2024-06-14 13:18:53,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:53,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:53,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:53,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 347 transitions, 5154 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 13:18:53,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:53,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:53,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:55,714 INFO L124 PetriNetUnfolderBase]: 2395/3903 cut-off events. [2024-06-14 13:18:55,714 INFO L125 PetriNetUnfolderBase]: For 377894/377900 co-relation queries the response was YES. [2024-06-14 13:18:55,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30743 conditions, 3903 events. 2395/3903 cut-off events. For 377894/377900 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22912 event pairs, 576 based on Foata normal form. 2/3898 useless extension candidates. Maximal degree in co-relation 30608. Up to 3231 conditions per place. [2024-06-14 13:18:55,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 201 selfloop transitions, 162 changer transitions 0/368 dead transitions. [2024-06-14 13:18:55,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 368 transitions, 6291 flow [2024-06-14 13:18:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:18:55,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:18:55,756 INFO L175 Difference]: Start difference. First operand has 280 places, 347 transitions, 5154 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:18:55,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 368 transitions, 6291 flow [2024-06-14 13:18:56,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 368 transitions, 6101 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:56,453 INFO L231 Difference]: Finished difference. Result has 283 places, 350 transitions, 5359 flow [2024-06-14 13:18:56,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5359, PETRI_PLACES=283, PETRI_TRANSITIONS=350} [2024-06-14 13:18:56,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 13:18:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 350 transitions, 5359 flow [2024-06-14 13:18:56,454 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 13:18:56,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:56,454 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 13:18:56,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:18:56,454 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 13:18:56,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 443616161, now seen corresponding path program 5 times [2024-06-14 13:18:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606733226] [2024-06-14 13:18:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:59,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:59,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606733226] [2024-06-14 13:18:59,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606733226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:59,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543148435] [2024-06-14 13:18:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:59,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:59,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 350 transitions, 5359 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 13:18:59,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:59,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:59,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:01,154 INFO L124 PetriNetUnfolderBase]: 2421/3951 cut-off events. [2024-06-14 13:19:01,154 INFO L125 PetriNetUnfolderBase]: For 398328/398340 co-relation queries the response was YES. [2024-06-14 13:19:01,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31501 conditions, 3951 events. 2421/3951 cut-off events. For 398328/398340 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23238 event pairs, 534 based on Foata normal form. 14/3962 useless extension candidates. Maximal degree in co-relation 31365. Up to 3274 conditions per place. [2024-06-14 13:19:01,202 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 256 selfloop transitions, 128 changer transitions 0/389 dead transitions. [2024-06-14 13:19:01,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 389 transitions, 6903 flow [2024-06-14 13:19:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:19:01,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:19:01,203 INFO L175 Difference]: Start difference. First operand has 283 places, 350 transitions, 5359 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:19:01,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 389 transitions, 6903 flow [2024-06-14 13:19:01,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 389 transitions, 6597 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:01,971 INFO L231 Difference]: Finished difference. Result has 287 places, 364 transitions, 5669 flow [2024-06-14 13:19:01,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5053, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5669, PETRI_PLACES=287, PETRI_TRANSITIONS=364} [2024-06-14 13:19:01,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 13:19:01,972 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 364 transitions, 5669 flow [2024-06-14 13:19:01,972 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 13:19:01,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:01,972 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 13:19:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:19:01,972 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 13:19:01,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 443200451, now seen corresponding path program 6 times [2024-06-14 13:19:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:01,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557224192] [2024-06-14 13:19:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:04,916 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 13:19:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557224192] [2024-06-14 13:19:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557224192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:04,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876786494] [2024-06-14 13:19:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:04,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:04,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 364 transitions, 5669 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 13:19:04,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:04,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:04,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:06,555 INFO L124 PetriNetUnfolderBase]: 2415/3946 cut-off events. [2024-06-14 13:19:06,555 INFO L125 PetriNetUnfolderBase]: For 403834/403846 co-relation queries the response was YES. [2024-06-14 13:19:06,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31951 conditions, 3946 events. 2415/3946 cut-off events. For 403834/403846 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23268 event pairs, 526 based on Foata normal form. 14/3957 useless extension candidates. Maximal degree in co-relation 31813. Up to 3538 conditions per place. [2024-06-14 13:19:06,604 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 92 changer transitions 0/384 dead transitions. [2024-06-14 13:19:06,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 384 transitions, 6639 flow [2024-06-14 13:19:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:19:06,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:19:06,605 INFO L175 Difference]: Start difference. First operand has 287 places, 364 transitions, 5669 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:19:06,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 384 transitions, 6639 flow [2024-06-14 13:19:07,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 384 transitions, 6509 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:07,593 INFO L231 Difference]: Finished difference. Result has 293 places, 364 transitions, 5729 flow [2024-06-14 13:19:07,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5539, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5729, PETRI_PLACES=293, PETRI_TRANSITIONS=364} [2024-06-14 13:19:07,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:19:07,594 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 364 transitions, 5729 flow [2024-06-14 13:19:07,594 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 13:19:07,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:07,594 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 13:19:07,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:19:07,594 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 13:19:07,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2130604095, now seen corresponding path program 8 times [2024-06-14 13:19:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459402712] [2024-06-14 13:19:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:10,532 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 13:19:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459402712] [2024-06-14 13:19:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459402712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:10,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:10,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104099419] [2024-06-14 13:19:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:10,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:10,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 364 transitions, 5729 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 13:19:10,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:10,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:12,764 INFO L124 PetriNetUnfolderBase]: 2412/3946 cut-off events. [2024-06-14 13:19:12,764 INFO L125 PetriNetUnfolderBase]: For 404821/404833 co-relation queries the response was YES. [2024-06-14 13:19:12,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31809 conditions, 3946 events. 2412/3946 cut-off events. For 404821/404833 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23256 event pairs, 521 based on Foata normal form. 13/3956 useless extension candidates. Maximal degree in co-relation 31668. Up to 3541 conditions per place. [2024-06-14 13:19:12,808 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 90 changer transitions 0/385 dead transitions. [2024-06-14 13:19:12,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 385 transitions, 6705 flow [2024-06-14 13:19:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:19:12,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-14 13:19:12,810 INFO L175 Difference]: Start difference. First operand has 293 places, 364 transitions, 5729 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:19:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 385 transitions, 6705 flow [2024-06-14 13:19:13,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 385 transitions, 6495 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:13,700 INFO L231 Difference]: Finished difference. Result has 296 places, 364 transitions, 5705 flow [2024-06-14 13:19:13,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5705, PETRI_PLACES=296, PETRI_TRANSITIONS=364} [2024-06-14 13:19:13,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 13:19:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 364 transitions, 5705 flow [2024-06-14 13:19:13,701 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 13:19:13,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:13,701 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 13:19:13,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:19:13,701 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 13:19:13,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1541400723, now seen corresponding path program 8 times [2024-06-14 13:19:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:13,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734161172] [2024-06-14 13:19:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:13,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734161172] [2024-06-14 13:19:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734161172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:17,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:17,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887199341] [2024-06-14 13:19:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:17,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:17,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:17,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:17,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 364 transitions, 5705 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 13:19:17,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:17,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:17,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:19,047 INFO L124 PetriNetUnfolderBase]: 2417/3956 cut-off events. [2024-06-14 13:19:19,047 INFO L125 PetriNetUnfolderBase]: For 412938/412944 co-relation queries the response was YES. [2024-06-14 13:19:19,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31980 conditions, 3956 events. 2417/3956 cut-off events. For 412938/412944 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23242 event pairs, 515 based on Foata normal form. 2/3956 useless extension candidates. Maximal degree in co-relation 31838. Up to 3365 conditions per place. [2024-06-14 13:19:19,090 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 126 changer transitions 0/397 dead transitions. [2024-06-14 13:19:19,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 397 transitions, 6948 flow [2024-06-14 13:19:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:19:19,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:19:19,091 INFO L175 Difference]: Start difference. First operand has 296 places, 364 transitions, 5705 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:19:19,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 397 transitions, 6948 flow [2024-06-14 13:19:19,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 397 transitions, 6652 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:19,899 INFO L231 Difference]: Finished difference. Result has 295 places, 367 transitions, 5802 flow [2024-06-14 13:19:19,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5802, PETRI_PLACES=295, PETRI_TRANSITIONS=367} [2024-06-14 13:19:19,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 13:19:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 367 transitions, 5802 flow [2024-06-14 13:19:19,900 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 13:19:19,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:19,900 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 13:19:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:19:19,900 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 13:19:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1541400537, now seen corresponding path program 9 times [2024-06-14 13:19:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136261860] [2024-06-14 13:19:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136261860] [2024-06-14 13:19:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136261860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:22,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:22,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128471526] [2024-06-14 13:19:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:22,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 367 transitions, 5802 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 13:19:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:24,532 INFO L124 PetriNetUnfolderBase]: 2414/3957 cut-off events. [2024-06-14 13:19:24,532 INFO L125 PetriNetUnfolderBase]: For 417726/417728 co-relation queries the response was YES. [2024-06-14 13:19:24,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32261 conditions, 3957 events. 2414/3957 cut-off events. For 417726/417728 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23361 event pairs, 498 based on Foata normal form. 1/3957 useless extension candidates. Maximal degree in co-relation 32118. Up to 3457 conditions per place. [2024-06-14 13:19:24,584 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 290 selfloop transitions, 104 changer transitions 0/399 dead transitions. [2024-06-14 13:19:24,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 399 transitions, 6838 flow [2024-06-14 13:19:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:19:24,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:19:24,586 INFO L175 Difference]: Start difference. First operand has 295 places, 367 transitions, 5802 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:19:24,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 399 transitions, 6838 flow [2024-06-14 13:19:25,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 399 transitions, 6546 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:25,573 INFO L231 Difference]: Finished difference. Result has 295 places, 367 transitions, 5754 flow [2024-06-14 13:19:25,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5754, PETRI_PLACES=295, PETRI_TRANSITIONS=367} [2024-06-14 13:19:25,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 13:19:25,573 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 367 transitions, 5754 flow [2024-06-14 13:19:25,574 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 13:19:25,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:25,574 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 13:19:25,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:19:25,574 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 13:19:25,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1313083491, now seen corresponding path program 7 times [2024-06-14 13:19:25,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:25,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142675209] [2024-06-14 13:19:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:25,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:28,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142675209] [2024-06-14 13:19:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142675209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:28,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:28,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127624980] [2024-06-14 13:19:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:28,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:28,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:28,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:28,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 367 transitions, 5754 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 13:19:28,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:28,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:28,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:30,321 INFO L124 PetriNetUnfolderBase]: 2536/4134 cut-off events. [2024-06-14 13:19:30,321 INFO L125 PetriNetUnfolderBase]: For 477395/477401 co-relation queries the response was YES. [2024-06-14 13:19:30,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35000 conditions, 4134 events. 2536/4134 cut-off events. For 477395/477401 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24396 event pairs, 498 based on Foata normal form. 3/4135 useless extension candidates. Maximal degree in co-relation 34856. Up to 3302 conditions per place. [2024-06-14 13:19:30,372 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 255 selfloop transitions, 155 changer transitions 0/415 dead transitions. [2024-06-14 13:19:30,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 415 transitions, 7631 flow [2024-06-14 13:19:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:19:30,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:19:30,374 INFO L175 Difference]: Start difference. First operand has 295 places, 367 transitions, 5754 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:19:30,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 415 transitions, 7631 flow [2024-06-14 13:19:31,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 7448 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:31,351 INFO L231 Difference]: Finished difference. Result has 298 places, 388 transitions, 6439 flow [2024-06-14 13:19:31,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6439, PETRI_PLACES=298, PETRI_TRANSITIONS=388} [2024-06-14 13:19:31,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 13:19:31,351 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 388 transitions, 6439 flow [2024-06-14 13:19:31,352 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 13:19:31,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:31,352 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 13:19:31,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:19:31,352 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 13:19:31,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1011465193, now seen corresponding path program 8 times [2024-06-14 13:19:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94247692] [2024-06-14 13:19:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:34,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:34,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94247692] [2024-06-14 13:19:34,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94247692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:34,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:34,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997419149] [2024-06-14 13:19:34,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:34,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:34,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:34,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:34,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 388 transitions, 6439 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 13:19:34,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:34,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:34,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:36,763 INFO L124 PetriNetUnfolderBase]: 2602/4243 cut-off events. [2024-06-14 13:19:36,764 INFO L125 PetriNetUnfolderBase]: For 471455/471457 co-relation queries the response was YES. [2024-06-14 13:19:36,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 4243 events. 2602/4243 cut-off events. For 471455/471457 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25169 event pairs, 520 based on Foata normal form. 4/4246 useless extension candidates. Maximal degree in co-relation 36335. Up to 3531 conditions per place. [2024-06-14 13:19:36,819 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 298 selfloop transitions, 137 changer transitions 0/440 dead transitions. [2024-06-14 13:19:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 440 transitions, 8047 flow [2024-06-14 13:19:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:19:36,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:19:36,821 INFO L175 Difference]: Start difference. First operand has 298 places, 388 transitions, 6439 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:19:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 440 transitions, 8047 flow [2024-06-14 13:19:37,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 440 transitions, 7758 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:37,961 INFO L231 Difference]: Finished difference. Result has 304 places, 407 transitions, 6826 flow [2024-06-14 13:19:37,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6826, PETRI_PLACES=304, PETRI_TRANSITIONS=407} [2024-06-14 13:19:37,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-14 13:19:37,961 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 407 transitions, 6826 flow [2024-06-14 13:19:37,962 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 13:19:37,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:37,962 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, 1] [2024-06-14 13:19:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:19:37,962 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 13:19:37,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1023083683, now seen corresponding path program 9 times [2024-06-14 13:19:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590407092] [2024-06-14 13:19:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:37,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:41,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590407092] [2024-06-14 13:19:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590407092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:41,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:41,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994682571] [2024-06-14 13:19:41,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:41,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:41,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:41,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 407 transitions, 6826 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 13:19:41,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:43,226 INFO L124 PetriNetUnfolderBase]: 2622/4270 cut-off events. [2024-06-14 13:19:43,226 INFO L125 PetriNetUnfolderBase]: For 480576/480582 co-relation queries the response was YES. [2024-06-14 13:19:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36963 conditions, 4270 events. 2622/4270 cut-off events. For 480576/480582 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25300 event pairs, 500 based on Foata normal form. 5/4273 useless extension candidates. Maximal degree in co-relation 36816. Up to 3371 conditions per place. [2024-06-14 13:19:43,283 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 175 changer transitions 0/441 dead transitions. [2024-06-14 13:19:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 441 transitions, 8428 flow [2024-06-14 13:19:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:19:43,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:19:43,284 INFO L175 Difference]: Start difference. First operand has 304 places, 407 transitions, 6826 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:19:43,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 441 transitions, 8428 flow [2024-06-14 13:19:44,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 441 transitions, 8144 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:44,368 INFO L231 Difference]: Finished difference. Result has 308 places, 413 transitions, 7027 flow [2024-06-14 13:19:44,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7027, PETRI_PLACES=308, PETRI_TRANSITIONS=413} [2024-06-14 13:19:44,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-14 13:19:44,369 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 413 transitions, 7027 flow [2024-06-14 13:19:44,369 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 13:19:44,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:44,369 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 13:19:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:19:44,370 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 13:19:44,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -860251987, now seen corresponding path program 10 times [2024-06-14 13:19:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:44,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167411130] [2024-06-14 13:19:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:47,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167411130] [2024-06-14 13:19:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167411130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:47,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:47,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:47,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738534914] [2024-06-14 13:19:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:47,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:47,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 413 transitions, 7027 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 13:19:47,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:47,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:47,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:49,652 INFO L124 PetriNetUnfolderBase]: 2610/4249 cut-off events. [2024-06-14 13:19:49,652 INFO L125 PetriNetUnfolderBase]: For 479501/479503 co-relation queries the response was YES. [2024-06-14 13:19:49,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36682 conditions, 4249 events. 2610/4249 cut-off events. For 479501/479503 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25205 event pairs, 518 based on Foata normal form. 4/4252 useless extension candidates. Maximal degree in co-relation 36534. Up to 3553 conditions per place. [2024-06-14 13:19:49,702 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 299 selfloop transitions, 151 changer transitions 0/455 dead transitions. [2024-06-14 13:19:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 455 transitions, 8435 flow [2024-06-14 13:19:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 13:19:49,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-14 13:19:49,704 INFO L175 Difference]: Start difference. First operand has 308 places, 413 transitions, 7027 flow. Second operand 11 states and 196 transitions. [2024-06-14 13:19:49,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 455 transitions, 8435 flow [2024-06-14 13:19:50,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 455 transitions, 7994 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:50,916 INFO L231 Difference]: Finished difference. Result has 313 places, 416 transitions, 6991 flow [2024-06-14 13:19:50,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6991, PETRI_PLACES=313, PETRI_TRANSITIONS=416} [2024-06-14 13:19:50,918 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-14 13:19:50,918 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 416 transitions, 6991 flow [2024-06-14 13:19:50,918 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 13:19:50,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:50,918 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 13:19:50,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:19:50,918 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 13:19:50,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1541400351, now seen corresponding path program 11 times [2024-06-14 13:19:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480794739] [2024-06-14 13:19:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480794739] [2024-06-14 13:19:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480794739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:54,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:54,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820465708] [2024-06-14 13:19:54,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:54,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:54,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 416 transitions, 6991 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 13:19:54,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:54,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:54,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:55,714 INFO L124 PetriNetUnfolderBase]: 2604/4246 cut-off events. [2024-06-14 13:19:55,714 INFO L125 PetriNetUnfolderBase]: For 480530/480536 co-relation queries the response was YES. [2024-06-14 13:19:55,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36310 conditions, 4246 events. 2604/4246 cut-off events. For 480530/480536 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25175 event pairs, 549 based on Foata normal form. 3/4247 useless extension candidates. Maximal degree in co-relation 36161. Up to 3715 conditions per place. [2024-06-14 13:19:55,771 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 333 selfloop transitions, 104 changer transitions 0/442 dead transitions. [2024-06-14 13:19:55,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 442 transitions, 8099 flow [2024-06-14 13:19:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:19:55,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:19:55,772 INFO L175 Difference]: Start difference. First operand has 313 places, 416 transitions, 6991 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:19:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 442 transitions, 8099 flow [2024-06-14 13:19:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 442 transitions, 7709 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-14 13:19:56,922 INFO L231 Difference]: Finished difference. Result has 312 places, 416 transitions, 6815 flow [2024-06-14 13:19:56,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6601, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6815, PETRI_PLACES=312, PETRI_TRANSITIONS=416} [2024-06-14 13:19:56,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:19:56,923 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 416 transitions, 6815 flow [2024-06-14 13:19:56,923 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 13:19:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:19:56,923 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 13:19:56,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -860252359, now seen corresponding path program 9 times [2024-06-14 13:19:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65454699] [2024-06-14 13:19:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65454699] [2024-06-14 13:20:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65454699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:00,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56690759] [2024-06-14 13:20:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:00,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:00,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:00,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:00,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 416 transitions, 6815 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 13:20:00,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:00,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:00,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:02,619 INFO L124 PetriNetUnfolderBase]: 2601/4243 cut-off events. [2024-06-14 13:20:02,619 INFO L125 PetriNetUnfolderBase]: For 480744/480746 co-relation queries the response was YES. [2024-06-14 13:20:02,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35986 conditions, 4243 events. 2601/4243 cut-off events. For 480744/480746 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25185 event pairs, 531 based on Foata normal form. 1/4243 useless extension candidates. Maximal degree in co-relation 35836. Up to 3625 conditions per place. [2024-06-14 13:20:02,668 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 322 selfloop transitions, 126 changer transitions 0/453 dead transitions. [2024-06-14 13:20:02,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 453 transitions, 7979 flow [2024-06-14 13:20:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:20:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:20:02,674 INFO L175 Difference]: Start difference. First operand has 312 places, 416 transitions, 6815 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:20:02,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 453 transitions, 7979 flow [2024-06-14 13:20:04,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 453 transitions, 7731 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:04,063 INFO L231 Difference]: Finished difference. Result has 314 places, 416 transitions, 6833 flow [2024-06-14 13:20:04,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6567, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6833, PETRI_PLACES=314, PETRI_TRANSITIONS=416} [2024-06-14 13:20:04,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:20:04,064 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 416 transitions, 6833 flow [2024-06-14 13:20:04,064 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 13:20:04,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:04,064 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 13:20:04,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:20:04,064 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 13:20:04,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash 175575127, now seen corresponding path program 12 times [2024-06-14 13:20:04,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:04,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354196277] [2024-06-14 13:20:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:04,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:07,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:07,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354196277] [2024-06-14 13:20:07,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354196277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:07,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:07,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:07,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874071996] [2024-06-14 13:20:07,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:07,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:07,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:07,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:07,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 416 transitions, 6833 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 13:20:07,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:07,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:07,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:08,844 INFO L124 PetriNetUnfolderBase]: 2595/4240 cut-off events. [2024-06-14 13:20:08,844 INFO L125 PetriNetUnfolderBase]: For 488623/488629 co-relation queries the response was YES. [2024-06-14 13:20:08,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35934 conditions, 4240 events. 2595/4240 cut-off events. For 488623/488629 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25258 event pairs, 513 based on Foata normal form. 3/4241 useless extension candidates. Maximal degree in co-relation 35783. Up to 3355 conditions per place. [2024-06-14 13:20:08,899 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 185 changer transitions 0/444 dead transitions. [2024-06-14 13:20:08,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 444 transitions, 8134 flow [2024-06-14 13:20:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:20:08,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:20:08,901 INFO L175 Difference]: Start difference. First operand has 314 places, 416 transitions, 6833 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:20:08,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 444 transitions, 8134 flow [2024-06-14 13:20:10,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 444 transitions, 7862 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:10,120 INFO L231 Difference]: Finished difference. Result has 314 places, 416 transitions, 6941 flow [2024-06-14 13:20:10,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6941, PETRI_PLACES=314, PETRI_TRANSITIONS=416} [2024-06-14 13:20:10,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:20:10,120 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 416 transitions, 6941 flow [2024-06-14 13:20:10,120 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 13:20:10,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:10,121 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 13:20:10,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:20:10,121 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 13:20:10,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1515233503, now seen corresponding path program 10 times [2024-06-14 13:20:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333429934] [2024-06-14 13:20:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:12,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:12,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333429934] [2024-06-14 13:20:12,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333429934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:12,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208758626] [2024-06-14 13:20:12,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:12,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:12,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 416 transitions, 6941 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 13:20:12,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:12,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:14,275 INFO L124 PetriNetUnfolderBase]: 2592/4232 cut-off events. [2024-06-14 13:20:14,275 INFO L125 PetriNetUnfolderBase]: For 482226/482232 co-relation queries the response was YES. [2024-06-14 13:20:14,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36006 conditions, 4232 events. 2592/4232 cut-off events. For 482226/482232 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25124 event pairs, 550 based on Foata normal form. 2/4232 useless extension candidates. Maximal degree in co-relation 35854. Up to 3706 conditions per place. [2024-06-14 13:20:14,332 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 333 selfloop transitions, 101 changer transitions 0/439 dead transitions. [2024-06-14 13:20:14,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 439 transitions, 7873 flow [2024-06-14 13:20:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:20:14,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:20:14,333 INFO L175 Difference]: Start difference. First operand has 314 places, 416 transitions, 6941 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:20:14,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 439 transitions, 7873 flow [2024-06-14 13:20:15,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 439 transitions, 7559 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:15,667 INFO L231 Difference]: Finished difference. Result has 316 places, 416 transitions, 6839 flow [2024-06-14 13:20:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6627, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6839, PETRI_PLACES=316, PETRI_TRANSITIONS=416} [2024-06-14 13:20:15,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 13:20:15,668 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 416 transitions, 6839 flow [2024-06-14 13:20:15,668 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 13:20:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:15,668 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 13:20:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:20:15,668 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 13:20:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1011474121, now seen corresponding path program 2 times [2024-06-14 13:20:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853831492] [2024-06-14 13:20:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853831492] [2024-06-14 13:20:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853831492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:19,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264235091] [2024-06-14 13:20:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:19,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:19,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:19,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 416 transitions, 6839 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:19,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:19,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:19,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:21,146 INFO L124 PetriNetUnfolderBase]: 2492/4100 cut-off events. [2024-06-14 13:20:21,146 INFO L125 PetriNetUnfolderBase]: For 532446/532461 co-relation queries the response was YES. [2024-06-14 13:20:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35246 conditions, 4100 events. 2492/4100 cut-off events. For 532446/532461 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 24707 event pairs, 486 based on Foata normal form. 21/4086 useless extension candidates. Maximal degree in co-relation 35093. Up to 3487 conditions per place. [2024-06-14 13:20:21,205 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 338 selfloop transitions, 52 changer transitions 0/441 dead transitions. [2024-06-14 13:20:21,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 441 transitions, 7729 flow [2024-06-14 13:20:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:20:21,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:20:21,206 INFO L175 Difference]: Start difference. First operand has 316 places, 416 transitions, 6839 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:20:21,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 441 transitions, 7729 flow [2024-06-14 13:20:22,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 441 transitions, 7321 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:20:22,314 INFO L231 Difference]: Finished difference. Result has 312 places, 417 transitions, 6569 flow [2024-06-14 13:20:22,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6569, PETRI_PLACES=312, PETRI_TRANSITIONS=417} [2024-06-14 13:20:22,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:20:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 417 transitions, 6569 flow [2024-06-14 13:20:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:22,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:22,315 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 13:20:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:20:22,315 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 13:20:22,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1304978913, now seen corresponding path program 3 times [2024-06-14 13:20:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749875434] [2024-06-14 13:20:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:26,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749875434] [2024-06-14 13:20:26,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749875434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:26,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:26,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592480932] [2024-06-14 13:20:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:26,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:26,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:26,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 417 transitions, 6569 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:26,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:26,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:27,720 INFO L124 PetriNetUnfolderBase]: 2529/4159 cut-off events. [2024-06-14 13:20:27,720 INFO L125 PetriNetUnfolderBase]: For 531373/531391 co-relation queries the response was YES. [2024-06-14 13:20:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35364 conditions, 4159 events. 2529/4159 cut-off events. For 531373/531391 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25112 event pairs, 472 based on Foata normal form. 25/4144 useless extension candidates. Maximal degree in co-relation 35211. Up to 3589 conditions per place. [2024-06-14 13:20:27,778 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 329 selfloop transitions, 56 changer transitions 0/436 dead transitions. [2024-06-14 13:20:27,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 436 transitions, 7433 flow [2024-06-14 13:20:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:20:27,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:20:27,779 INFO L175 Difference]: Start difference. First operand has 312 places, 417 transitions, 6569 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:20:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 436 transitions, 7433 flow [2024-06-14 13:20:29,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 436 transitions, 7329 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:29,012 INFO L231 Difference]: Finished difference. Result has 314 places, 418 transitions, 6605 flow [2024-06-14 13:20:29,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6605, PETRI_PLACES=314, PETRI_TRANSITIONS=418} [2024-06-14 13:20:29,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:20:29,013 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 418 transitions, 6605 flow [2024-06-14 13:20:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:29,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:29,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:20:29,013 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 13:20:29,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1304503683, now seen corresponding path program 4 times [2024-06-14 13:20:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653989910] [2024-06-14 13:20:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653989910] [2024-06-14 13:20:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653989910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:32,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953409422] [2024-06-14 13:20:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:32,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:32,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:32,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:20:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 418 transitions, 6605 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:20:32,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:34,539 INFO L124 PetriNetUnfolderBase]: 2533/4167 cut-off events. [2024-06-14 13:20:34,539 INFO L125 PetriNetUnfolderBase]: For 501856/501874 co-relation queries the response was YES. [2024-06-14 13:20:34,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35017 conditions, 4167 events. 2533/4167 cut-off events. For 501856/501874 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25209 event pairs, 467 based on Foata normal form. 21/4148 useless extension candidates. Maximal degree in co-relation 34863. Up to 3459 conditions per place. [2024-06-14 13:20:34,603 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 328 selfloop transitions, 60 changer transitions 0/439 dead transitions. [2024-06-14 13:20:34,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 439 transitions, 7495 flow [2024-06-14 13:20:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:20:34,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:20:34,604 INFO L175 Difference]: Start difference. First operand has 314 places, 418 transitions, 6605 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:20:34,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 439 transitions, 7495 flow [2024-06-14 13:20:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 439 transitions, 7379 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:35,709 INFO L231 Difference]: Finished difference. Result has 316 places, 419 transitions, 6635 flow [2024-06-14 13:20:35,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6635, PETRI_PLACES=316, PETRI_TRANSITIONS=419} [2024-06-14 13:20:35,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 13:20:35,710 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 419 transitions, 6635 flow [2024-06-14 13:20:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:35,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:35,710 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 13:20:35,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:20:35,710 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 13:20:35,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 438859583, now seen corresponding path program 1 times [2024-06-14 13:20:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542310998] [2024-06-14 13:20:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542310998] [2024-06-14 13:20:37,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542310998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:37,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:37,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352708060] [2024-06-14 13:20:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:37,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:37,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:37,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:37,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:37,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 419 transitions, 6635 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 13:20:37,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:37,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:37,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:39,356 INFO L124 PetriNetUnfolderBase]: 2690/4382 cut-off events. [2024-06-14 13:20:39,356 INFO L125 PetriNetUnfolderBase]: For 493999/494003 co-relation queries the response was YES. [2024-06-14 13:20:39,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36360 conditions, 4382 events. 2690/4382 cut-off events. For 493999/494003 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26142 event pairs, 527 based on Foata normal form. 4/4385 useless extension candidates. Maximal degree in co-relation 36205. Up to 4048 conditions per place. [2024-06-14 13:20:39,418 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 409 selfloop transitions, 31 changer transitions 0/445 dead transitions. [2024-06-14 13:20:39,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 445 transitions, 7809 flow [2024-06-14 13:20:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:20:39,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:20:39,419 INFO L175 Difference]: Start difference. First operand has 316 places, 419 transitions, 6635 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:20:39,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 445 transitions, 7809 flow [2024-06-14 13:20:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 445 transitions, 7679 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:40,772 INFO L231 Difference]: Finished difference. Result has 318 places, 423 transitions, 6640 flow [2024-06-14 13:20:40,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6640, PETRI_PLACES=318, PETRI_TRANSITIONS=423} [2024-06-14 13:20:40,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 13:20:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 423 transitions, 6640 flow [2024-06-14 13:20:40,773 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 13:20:40,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:40,773 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 13:20:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:20:40,773 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 13:20:40,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -169252093, now seen corresponding path program 2 times [2024-06-14 13:20:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538561839] [2024-06-14 13:20:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:43,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538561839] [2024-06-14 13:20:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538561839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:43,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:43,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:43,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920160235] [2024-06-14 13:20:43,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:43,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:43,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:43,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:43,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 423 transitions, 6640 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 13:20:43,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:43,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:43,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:44,703 INFO L124 PetriNetUnfolderBase]: 2698/4404 cut-off events. [2024-06-14 13:20:44,703 INFO L125 PetriNetUnfolderBase]: For 502467/502471 co-relation queries the response was YES. [2024-06-14 13:20:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36399 conditions, 4404 events. 2698/4404 cut-off events. For 502467/502471 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26390 event pairs, 569 based on Foata normal form. 4/4407 useless extension candidates. Maximal degree in co-relation 36243. Up to 4097 conditions per place. [2024-06-14 13:20:44,763 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 408 selfloop transitions, 28 changer transitions 0/441 dead transitions. [2024-06-14 13:20:44,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 441 transitions, 7590 flow [2024-06-14 13:20:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:20:44,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 13:20:44,764 INFO L175 Difference]: Start difference. First operand has 318 places, 423 transitions, 6640 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:20:44,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 441 transitions, 7590 flow [2024-06-14 13:20:45,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 441 transitions, 7505 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:45,924 INFO L231 Difference]: Finished difference. Result has 322 places, 425 transitions, 6656 flow [2024-06-14 13:20:45,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6656, PETRI_PLACES=322, PETRI_TRANSITIONS=425} [2024-06-14 13:20:45,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 13:20:45,925 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 425 transitions, 6656 flow [2024-06-14 13:20:45,925 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 13:20:45,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:45,925 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 13:20:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:20:45,925 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 13:20:45,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1247681597, now seen corresponding path program 3 times [2024-06-14 13:20:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043760698] [2024-06-14 13:20:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043760698] [2024-06-14 13:20:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043760698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:48,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662273078] [2024-06-14 13:20:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:48,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:48,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:48,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 425 transitions, 6656 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 13:20:48,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:48,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:48,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:50,504 INFO L124 PetriNetUnfolderBase]: 2706/4407 cut-off events. [2024-06-14 13:20:50,504 INFO L125 PetriNetUnfolderBase]: For 513488/513490 co-relation queries the response was YES. [2024-06-14 13:20:50,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36542 conditions, 4407 events. 2706/4407 cut-off events. For 513488/513490 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26335 event pairs, 567 based on Foata normal form. 2/4407 useless extension candidates. Maximal degree in co-relation 36384. Up to 4109 conditions per place. [2024-06-14 13:20:50,556 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 409 selfloop transitions, 30 changer transitions 0/444 dead transitions. [2024-06-14 13:20:50,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 444 transitions, 7604 flow [2024-06-14 13:20:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:20:50,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:20:50,557 INFO L175 Difference]: Start difference. First operand has 322 places, 425 transitions, 6656 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:20:50,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 444 transitions, 7604 flow [2024-06-14 13:20:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 444 transitions, 7537 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:51,636 INFO L231 Difference]: Finished difference. Result has 325 places, 427 transitions, 6684 flow [2024-06-14 13:20:51,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6589, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6684, PETRI_PLACES=325, PETRI_TRANSITIONS=427} [2024-06-14 13:20:51,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 13:20:51,637 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 427 transitions, 6684 flow [2024-06-14 13:20:51,637 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 13:20:51,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:51,637 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] [2024-06-14 13:20:51,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:20:51,638 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 13:20:51,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash 964923515, now seen corresponding path program 1 times [2024-06-14 13:20:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:51,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152788954] [2024-06-14 13:20:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:55,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:55,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152788954] [2024-06-14 13:20:55,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152788954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:55,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:55,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:55,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932964506] [2024-06-14 13:20:55,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:55,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:55,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:20:55,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 427 transitions, 6684 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 13:20:55,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:55,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:20:55,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:56,904 INFO L124 PetriNetUnfolderBase]: 2714/4413 cut-off events. [2024-06-14 13:20:56,904 INFO L125 PetriNetUnfolderBase]: For 525317/525319 co-relation queries the response was YES. [2024-06-14 13:20:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36803 conditions, 4413 events. 2714/4413 cut-off events. For 525317/525319 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26329 event pairs, 547 based on Foata normal form. 2/4413 useless extension candidates. Maximal degree in co-relation 36644. Up to 4057 conditions per place. [2024-06-14 13:20:56,965 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 392 selfloop transitions, 52 changer transitions 0/449 dead transitions. [2024-06-14 13:20:56,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 449 transitions, 7686 flow [2024-06-14 13:20:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:20:56,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:20:56,969 INFO L175 Difference]: Start difference. First operand has 325 places, 427 transitions, 6684 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:20:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 449 transitions, 7686 flow [2024-06-14 13:20:58,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 449 transitions, 7611 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:58,393 INFO L231 Difference]: Finished difference. Result has 327 places, 429 transitions, 6786 flow [2024-06-14 13:20:58,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6609, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6786, PETRI_PLACES=327, PETRI_TRANSITIONS=429} [2024-06-14 13:20:58,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 13:20:58,394 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 429 transitions, 6786 flow [2024-06-14 13:20:58,394 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 13:20:58,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:58,394 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 13:20:58,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:20:58,394 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 13:20:58,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 175405309, now seen corresponding path program 4 times [2024-06-14 13:20:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:58,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391419298] [2024-06-14 13:20:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391419298] [2024-06-14 13:21:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391419298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:00,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537930785] [2024-06-14 13:21:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:00,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:00,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:00,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 429 transitions, 6786 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 13:21:00,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:00,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:02,287 INFO L124 PetriNetUnfolderBase]: 2709/4414 cut-off events. [2024-06-14 13:21:02,287 INFO L125 PetriNetUnfolderBase]: For 529159/529161 co-relation queries the response was YES. [2024-06-14 13:21:02,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36856 conditions, 4414 events. 2709/4414 cut-off events. For 529159/529161 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26430 event pairs, 521 based on Foata normal form. 2/4415 useless extension candidates. Maximal degree in co-relation 36696. Up to 4101 conditions per place. [2024-06-14 13:21:02,346 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 424 selfloop transitions, 24 changer transitions 0/453 dead transitions. [2024-06-14 13:21:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 453 transitions, 7748 flow [2024-06-14 13:21:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:21:02,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:21:02,348 INFO L175 Difference]: Start difference. First operand has 327 places, 429 transitions, 6786 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:21:02,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 453 transitions, 7748 flow [2024-06-14 13:21:03,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 453 transitions, 7575 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:03,694 INFO L231 Difference]: Finished difference. Result has 328 places, 429 transitions, 6669 flow [2024-06-14 13:21:03,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6669, PETRI_PLACES=328, PETRI_TRANSITIONS=429} [2024-06-14 13:21:03,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-14 13:21:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 429 transitions, 6669 flow [2024-06-14 13:21:03,695 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 13:21:03,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:03,695 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 13:21:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:21:03,695 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 13:21:03,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1540969761, now seen corresponding path program 2 times [2024-06-14 13:21:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:03,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38709088] [2024-06-14 13:21:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:03,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:07,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:07,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38709088] [2024-06-14 13:21:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38709088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:07,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:07,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:07,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13676141] [2024-06-14 13:21:07,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:07,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:07,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:07,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:07,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:07,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:07,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 429 transitions, 6669 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 13:21:07,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:07,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:08,609 INFO L124 PetriNetUnfolderBase]: 2717/4432 cut-off events. [2024-06-14 13:21:08,609 INFO L125 PetriNetUnfolderBase]: For 539715/539717 co-relation queries the response was YES. [2024-06-14 13:21:08,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36935 conditions, 4432 events. 2717/4432 cut-off events. For 539715/539717 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26543 event pairs, 535 based on Foata normal form. 2/4433 useless extension candidates. Maximal degree in co-relation 36774. Up to 4097 conditions per place. [2024-06-14 13:21:08,672 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 416 selfloop transitions, 35 changer transitions 0/456 dead transitions. [2024-06-14 13:21:08,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 456 transitions, 7703 flow [2024-06-14 13:21:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:21:08,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:21:08,673 INFO L175 Difference]: Start difference. First operand has 328 places, 429 transitions, 6669 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:21:08,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 456 transitions, 7703 flow [2024-06-14 13:21:10,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 456 transitions, 7641 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:10,107 INFO L231 Difference]: Finished difference. Result has 330 places, 431 transitions, 6754 flow [2024-06-14 13:21:10,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6607, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6754, PETRI_PLACES=330, PETRI_TRANSITIONS=431} [2024-06-14 13:21:10,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 13:21:10,108 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 431 transitions, 6754 flow [2024-06-14 13:21:10,108 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 13:21:10,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:10,108 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 13:21:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:21:10,108 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 13:21:10,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1508553127, now seen corresponding path program 3 times [2024-06-14 13:21:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678469299] [2024-06-14 13:21:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678469299] [2024-06-14 13:21:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678469299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8555695] [2024-06-14 13:21:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:13,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:13,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 431 transitions, 6754 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 13:21:13,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:13,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:13,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:15,617 INFO L124 PetriNetUnfolderBase]: 2725/4444 cut-off events. [2024-06-14 13:21:15,617 INFO L125 PetriNetUnfolderBase]: For 552869/552871 co-relation queries the response was YES. [2024-06-14 13:21:15,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37322 conditions, 4444 events. 2725/4444 cut-off events. For 552869/552871 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26629 event pairs, 537 based on Foata normal form. 2/4445 useless extension candidates. Maximal degree in co-relation 37160. Up to 4109 conditions per place. [2024-06-14 13:21:15,683 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 415 selfloop transitions, 34 changer transitions 0/454 dead transitions. [2024-06-14 13:21:15,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 454 transitions, 7776 flow [2024-06-14 13:21:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:21:15,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 13:21:15,684 INFO L175 Difference]: Start difference. First operand has 330 places, 431 transitions, 6754 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:21:15,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 454 transitions, 7776 flow [2024-06-14 13:21:17,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 454 transitions, 7645 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:17,126 INFO L231 Difference]: Finished difference. Result has 333 places, 433 transitions, 6772 flow [2024-06-14 13:21:17,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6623, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6772, PETRI_PLACES=333, PETRI_TRANSITIONS=433} [2024-06-14 13:21:17,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:21:17,126 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 433 transitions, 6772 flow [2024-06-14 13:21:17,127 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 13:21:17,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:17,127 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 13:21:17,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:21:17,127 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 13:21:17,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1304497731, now seen corresponding path program 4 times [2024-06-14 13:21:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718359475] [2024-06-14 13:21:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718359475] [2024-06-14 13:21:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718359475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668001966] [2024-06-14 13:21:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:20,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:20,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 433 transitions, 6772 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 13:21:20,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:20,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:22,470 INFO L124 PetriNetUnfolderBase]: 2779/4522 cut-off events. [2024-06-14 13:21:22,470 INFO L125 PetriNetUnfolderBase]: For 598836/598838 co-relation queries the response was YES. [2024-06-14 13:21:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38615 conditions, 4522 events. 2779/4522 cut-off events. For 598836/598838 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27094 event pairs, 537 based on Foata normal form. 2/4523 useless extension candidates. Maximal degree in co-relation 38452. Up to 4088 conditions per place. [2024-06-14 13:21:22,531 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 38 changer transitions 0/462 dead transitions. [2024-06-14 13:21:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 462 transitions, 8058 flow [2024-06-14 13:21:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:21:22,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:21:22,533 INFO L175 Difference]: Start difference. First operand has 333 places, 433 transitions, 6772 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:21:22,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 462 transitions, 8058 flow [2024-06-14 13:21:23,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 462 transitions, 7925 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:23,952 INFO L231 Difference]: Finished difference. Result has 335 places, 436 transitions, 6822 flow [2024-06-14 13:21:23,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6822, PETRI_PLACES=335, PETRI_TRANSITIONS=436} [2024-06-14 13:21:23,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 13:21:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 436 transitions, 6822 flow [2024-06-14 13:21:23,953 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 13:21:23,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:23,953 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 13:21:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:21:23,953 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 13:21:23,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1597310528, now seen corresponding path program 1 times [2024-06-14 13:21:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127312483] [2024-06-14 13:21:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:23,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:27,739 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 13:21:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127312483] [2024-06-14 13:21:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127312483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:27,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:27,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:27,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370188286] [2024-06-14 13:21:27,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:27,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:27,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:27,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:27,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:27,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 436 transitions, 6822 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 13:21:27,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:27,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:27,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:29,788 INFO L124 PetriNetUnfolderBase]: 2847/4645 cut-off events. [2024-06-14 13:21:29,788 INFO L125 PetriNetUnfolderBase]: For 639247/639253 co-relation queries the response was YES. [2024-06-14 13:21:29,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39367 conditions, 4645 events. 2847/4645 cut-off events. For 639247/639253 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28026 event pairs, 456 based on Foata normal form. 14/4658 useless extension candidates. Maximal degree in co-relation 39203. Up to 3981 conditions per place. [2024-06-14 13:21:29,846 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 63 changer transitions 0/487 dead transitions. [2024-06-14 13:21:29,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 487 transitions, 8198 flow [2024-06-14 13:21:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:21:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:21:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:21:29,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:21:29,848 INFO L175 Difference]: Start difference. First operand has 335 places, 436 transitions, 6822 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:21:29,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 487 transitions, 8198 flow [2024-06-14 13:21:31,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 487 transitions, 8084 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:31,805 INFO L231 Difference]: Finished difference. Result has 342 places, 439 transitions, 6912 flow [2024-06-14 13:21:31,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6708, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6912, PETRI_PLACES=342, PETRI_TRANSITIONS=439} [2024-06-14 13:21:31,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 13:21:31,806 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 439 transitions, 6912 flow [2024-06-14 13:21:31,806 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 13:21:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:31,806 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 13:21:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:21:31,806 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 13:21:31,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1861818516, now seen corresponding path program 2 times [2024-06-14 13:21:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943401406] [2024-06-14 13:21:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:35,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943401406] [2024-06-14 13:21:35,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943401406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:35,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:35,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:35,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561728205] [2024-06-14 13:21:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:35,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:35,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 439 transitions, 6912 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 13:21:35,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:35,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:35,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:37,919 INFO L124 PetriNetUnfolderBase]: 2939/4785 cut-off events. [2024-06-14 13:21:37,919 INFO L125 PetriNetUnfolderBase]: For 652076/652082 co-relation queries the response was YES. [2024-06-14 13:21:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40692 conditions, 4785 events. 2939/4785 cut-off events. For 652076/652082 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 29055 event pairs, 561 based on Foata normal form. 14/4798 useless extension candidates. Maximal degree in co-relation 40525. Up to 4279 conditions per place. [2024-06-14 13:21:38,155 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 422 selfloop transitions, 69 changer transitions 0/496 dead transitions. [2024-06-14 13:21:38,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 496 transitions, 8301 flow [2024-06-14 13:21:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:21:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:21:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-14 13:21:38,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:21:38,157 INFO L175 Difference]: Start difference. First operand has 342 places, 439 transitions, 6912 flow. Second operand 12 states and 196 transitions. [2024-06-14 13:21:38,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 496 transitions, 8301 flow [2024-06-14 13:21:40,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 496 transitions, 8127 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:40,212 INFO L231 Difference]: Finished difference. Result has 349 places, 452 transitions, 7141 flow [2024-06-14 13:21:40,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7141, PETRI_PLACES=349, PETRI_TRANSITIONS=452} [2024-06-14 13:21:40,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:21:40,213 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 452 transitions, 7141 flow [2024-06-14 13:21:40,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:40,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:40,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:21:40,213 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 13:21:40,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1685848388, now seen corresponding path program 1 times [2024-06-14 13:21:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:40,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554294048] [2024-06-14 13:21:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:40,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:43,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:43,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554294048] [2024-06-14 13:21:43,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554294048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:43,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:43,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:43,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775511386] [2024-06-14 13:21:43,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:43,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:43,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:43,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:43,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 452 transitions, 7141 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 13:21:43,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:43,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:43,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:45,663 INFO L124 PetriNetUnfolderBase]: 2944/4794 cut-off events. [2024-06-14 13:21:45,664 INFO L125 PetriNetUnfolderBase]: For 630584/630590 co-relation queries the response was YES. [2024-06-14 13:21:45,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40709 conditions, 4794 events. 2944/4794 cut-off events. For 630584/630590 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29035 event pairs, 597 based on Foata normal form. 7/4800 useless extension candidates. Maximal degree in co-relation 40541. Up to 4336 conditions per place. [2024-06-14 13:21:45,734 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 81 changer transitions 0/493 dead transitions. [2024-06-14 13:21:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 493 transitions, 8471 flow [2024-06-14 13:21:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:21:45,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:21:45,736 INFO L175 Difference]: Start difference. First operand has 349 places, 452 transitions, 7141 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:21:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 493 transitions, 8471 flow [2024-06-14 13:21:47,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 493 transitions, 8329 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:47,946 INFO L231 Difference]: Finished difference. Result has 351 places, 455 transitions, 7220 flow [2024-06-14 13:21:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6999, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7220, PETRI_PLACES=351, PETRI_TRANSITIONS=455} [2024-06-14 13:21:47,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 13:21:47,947 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 455 transitions, 7220 flow [2024-06-14 13:21:47,947 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 13:21:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:47,948 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 13:21:47,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:21:47,948 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 13:21:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -96005198, now seen corresponding path program 2 times [2024-06-14 13:21:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887393867] [2024-06-14 13:21:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:52,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887393867] [2024-06-14 13:21:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887393867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:52,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:52,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583284058] [2024-06-14 13:21:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:52,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:21:52,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 455 transitions, 7220 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 13:21:52,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:52,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:21:52,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:54,423 INFO L124 PetriNetUnfolderBase]: 2941/4786 cut-off events. [2024-06-14 13:21:54,423 INFO L125 PetriNetUnfolderBase]: For 637869/637875 co-relation queries the response was YES. [2024-06-14 13:21:54,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40597 conditions, 4786 events. 2941/4786 cut-off events. For 637869/637875 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28985 event pairs, 593 based on Foata normal form. 7/4792 useless extension candidates. Maximal degree in co-relation 40428. Up to 4333 conditions per place. [2024-06-14 13:21:54,495 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 81 changer transitions 0/493 dead transitions. [2024-06-14 13:21:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 493 transitions, 8306 flow [2024-06-14 13:21:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:21:54,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 13:21:54,497 INFO L175 Difference]: Start difference. First operand has 351 places, 455 transitions, 7220 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:21:54,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 493 transitions, 8306 flow [2024-06-14 13:21:56,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 493 transitions, 8112 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:56,770 INFO L231 Difference]: Finished difference. Result has 354 places, 455 transitions, 7194 flow [2024-06-14 13:21:56,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7194, PETRI_PLACES=354, PETRI_TRANSITIONS=455} [2024-06-14 13:21:56,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 13:21:56,770 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 455 transitions, 7194 flow [2024-06-14 13:21:56,770 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 13:21:56,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:56,771 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 13:21:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:21:56,771 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 13:21:56,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1030077460, now seen corresponding path program 1 times [2024-06-14 13:21:56,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573965378] [2024-06-14 13:21:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:56,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:00,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573965378] [2024-06-14 13:22:00,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573965378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:00,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503963424] [2024-06-14 13:22:00,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:00,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:00,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:00,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:00,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 455 transitions, 7194 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 13:22:00,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:00,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:00,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:02,725 INFO L124 PetriNetUnfolderBase]: 2967/4828 cut-off events. [2024-06-14 13:22:02,725 INFO L125 PetriNetUnfolderBase]: For 666075/666081 co-relation queries the response was YES. [2024-06-14 13:22:02,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41165 conditions, 4828 events. 2967/4828 cut-off events. For 666075/666081 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29278 event pairs, 558 based on Foata normal form. 8/4835 useless extension candidates. Maximal degree in co-relation 40995. Up to 4181 conditions per place. [2024-06-14 13:22:02,796 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 374 selfloop transitions, 129 changer transitions 0/508 dead transitions. [2024-06-14 13:22:02,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 508 transitions, 8860 flow [2024-06-14 13:22:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:22:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:22:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:22:02,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:22:02,798 INFO L175 Difference]: Start difference. First operand has 354 places, 455 transitions, 7194 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:22:02,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 508 transitions, 8860 flow [2024-06-14 13:22:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 508 transitions, 8666 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:22:05,082 INFO L231 Difference]: Finished difference. Result has 358 places, 461 transitions, 7454 flow [2024-06-14 13:22:05,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7454, PETRI_PLACES=358, PETRI_TRANSITIONS=461} [2024-06-14 13:22:05,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:22:05,083 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 461 transitions, 7454 flow [2024-06-14 13:22:05,083 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 13:22:05,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:05,083 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 13:22:05,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:22:05,083 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 13:22:05,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1244076066, now seen corresponding path program 3 times [2024-06-14 13:22:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:05,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442872714] [2024-06-14 13:22:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:08,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442872714] [2024-06-14 13:22:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442872714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:08,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821592405] [2024-06-14 13:22:08,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:08,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:08,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:08,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:08,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 461 transitions, 7454 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 13:22:08,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:08,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:08,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:11,054 INFO L124 PetriNetUnfolderBase]: 3003/4879 cut-off events. [2024-06-14 13:22:11,054 INFO L125 PetriNetUnfolderBase]: For 713907/713909 co-relation queries the response was YES. [2024-06-14 13:22:11,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42438 conditions, 4879 events. 3003/4879 cut-off events. For 713907/713909 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29581 event pairs, 580 based on Foata normal form. 8/4886 useless extension candidates. Maximal degree in co-relation 42266. Up to 4370 conditions per place. [2024-06-14 13:22:11,135 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 428 selfloop transitions, 68 changer transitions 0/501 dead transitions. [2024-06-14 13:22:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 501 transitions, 8662 flow [2024-06-14 13:22:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:22:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:22:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-14 13:22:11,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701550387596899 [2024-06-14 13:22:11,137 INFO L175 Difference]: Start difference. First operand has 358 places, 461 transitions, 7454 flow. Second operand 12 states and 191 transitions. [2024-06-14 13:22:11,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 501 transitions, 8662 flow [2024-06-14 13:22:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 501 transitions, 8405 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:13,621 INFO L231 Difference]: Finished difference. Result has 366 places, 466 transitions, 7464 flow [2024-06-14 13:22:13,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7464, PETRI_PLACES=366, PETRI_TRANSITIONS=466} [2024-06-14 13:22:13,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:22:13,621 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 466 transitions, 7464 flow [2024-06-14 13:22:13,621 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 13:22:13,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:13,621 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 13:22:13,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:22:13,622 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 13:22:13,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash 970269742, now seen corresponding path program 3 times [2024-06-14 13:22:13,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:13,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946494402] [2024-06-14 13:22:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946494402] [2024-06-14 13:22:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946494402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:17,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:17,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:17,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96730725] [2024-06-14 13:22:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:17,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:17,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 466 transitions, 7464 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 13:22:17,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:17,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:17,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:19,713 INFO L124 PetriNetUnfolderBase]: 3048/4953 cut-off events. [2024-06-14 13:22:19,713 INFO L125 PetriNetUnfolderBase]: For 716687/716689 co-relation queries the response was YES. [2024-06-14 13:22:19,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43727 conditions, 4953 events. 3048/4953 cut-off events. For 716687/716689 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30145 event pairs, 635 based on Foata normal form. 1/4952 useless extension candidates. Maximal degree in co-relation 43550. Up to 4191 conditions per place. [2024-06-14 13:22:19,787 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 327 selfloop transitions, 182 changer transitions 0/514 dead transitions. [2024-06-14 13:22:19,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 514 transitions, 9545 flow [2024-06-14 13:22:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:22:19,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 13:22:19,789 INFO L175 Difference]: Start difference. First operand has 366 places, 466 transitions, 7464 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:22:19,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 514 transitions, 9545 flow [2024-06-14 13:22:22,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 514 transitions, 9374 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:22:22,455 INFO L231 Difference]: Finished difference. Result has 366 places, 484 transitions, 8046 flow [2024-06-14 13:22:22,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7293, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8046, PETRI_PLACES=366, PETRI_TRANSITIONS=484} [2024-06-14 13:22:22,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:22:22,456 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 484 transitions, 8046 flow [2024-06-14 13:22:22,456 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 13:22:22,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:22,456 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 13:22:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:22:22,456 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 13:22:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2042232896, now seen corresponding path program 1 times [2024-06-14 13:22:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792110352] [2024-06-14 13:22:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792110352] [2024-06-14 13:22:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792110352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:25,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:25,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50604413] [2024-06-14 13:22:25,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:25,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:25,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:25,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 484 transitions, 8046 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 13:22:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:27,648 INFO L124 PetriNetUnfolderBase]: 3090/5015 cut-off events. [2024-06-14 13:22:27,648 INFO L125 PetriNetUnfolderBase]: For 754490/754496 co-relation queries the response was YES. [2024-06-14 13:22:27,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44639 conditions, 5015 events. 3090/5015 cut-off events. For 754490/754496 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30547 event pairs, 612 based on Foata normal form. 8/5021 useless extension candidates. Maximal degree in co-relation 44462. Up to 4389 conditions per place. [2024-06-14 13:22:27,723 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 387 selfloop transitions, 133 changer transitions 0/525 dead transitions. [2024-06-14 13:22:27,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 525 transitions, 9739 flow [2024-06-14 13:22:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:22:27,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:22:27,725 INFO L175 Difference]: Start difference. First operand has 366 places, 484 transitions, 8046 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:22:27,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 525 transitions, 9739 flow [2024-06-14 13:22:30,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 525 transitions, 9465 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:30,743 INFO L231 Difference]: Finished difference. Result has 373 places, 493 transitions, 8205 flow [2024-06-14 13:22:30,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8205, PETRI_PLACES=373, PETRI_TRANSITIONS=493} [2024-06-14 13:22:30,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:22:30,744 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 493 transitions, 8205 flow [2024-06-14 13:22:30,744 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 13:22:30,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:30,744 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 13:22:30,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:22:30,744 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 13:22:30,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2042233268, now seen corresponding path program 4 times [2024-06-14 13:22:30,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:30,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017496809] [2024-06-14 13:22:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:30,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:34,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:34,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017496809] [2024-06-14 13:22:34,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017496809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:34,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:34,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595993871] [2024-06-14 13:22:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:34,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:34,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:34,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:34,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 493 transitions, 8205 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 13:22:34,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:34,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:34,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:36,927 INFO L124 PetriNetUnfolderBase]: 3103/5033 cut-off events. [2024-06-14 13:22:36,927 INFO L125 PetriNetUnfolderBase]: For 769698/769700 co-relation queries the response was YES. [2024-06-14 13:22:36,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44913 conditions, 5033 events. 3103/5033 cut-off events. For 769698/769700 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30625 event pairs, 636 based on Foata normal form. 1/5032 useless extension candidates. Maximal degree in co-relation 44735. Up to 4264 conditions per place. [2024-06-14 13:22:36,992 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 187 changer transitions 0/525 dead transitions. [2024-06-14 13:22:36,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 525 transitions, 10031 flow [2024-06-14 13:22:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:22:36,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:22:36,994 INFO L175 Difference]: Start difference. First operand has 373 places, 493 transitions, 8205 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:22:36,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 525 transitions, 10031 flow [2024-06-14 13:22:39,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 525 transitions, 9804 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:39,969 INFO L231 Difference]: Finished difference. Result has 375 places, 499 transitions, 8464 flow [2024-06-14 13:22:39,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8464, PETRI_PLACES=375, PETRI_TRANSITIONS=499} [2024-06-14 13:22:39,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 13:22:39,970 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 499 transitions, 8464 flow [2024-06-14 13:22:39,970 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 13:22:39,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:39,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:22:39,970 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 13:22:39,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2047894178, now seen corresponding path program 5 times [2024-06-14 13:22:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477956177] [2024-06-14 13:22:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477956177] [2024-06-14 13:22:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477956177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724923951] [2024-06-14 13:22:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:44,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:44,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 499 transitions, 8464 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 13:22:44,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:44,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:44,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:46,958 INFO L124 PetriNetUnfolderBase]: 3124/5059 cut-off events. [2024-06-14 13:22:46,958 INFO L125 PetriNetUnfolderBase]: For 798303/798305 co-relation queries the response was YES. [2024-06-14 13:22:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45706 conditions, 5059 events. 3124/5059 cut-off events. For 798303/798305 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30795 event pairs, 632 based on Foata normal form. 1/5057 useless extension candidates. Maximal degree in co-relation 45527. Up to 4288 conditions per place. [2024-06-14 13:22:47,037 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 199 changer transitions 0/542 dead transitions. [2024-06-14 13:22:47,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 542 transitions, 10255 flow [2024-06-14 13:22:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:22:47,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:22:47,039 INFO L175 Difference]: Start difference. First operand has 375 places, 499 transitions, 8464 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:22:47,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 542 transitions, 10255 flow [2024-06-14 13:22:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 542 transitions, 9919 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:50,075 INFO L231 Difference]: Finished difference. Result has 380 places, 508 transitions, 8745 flow [2024-06-14 13:22:50,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8155, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8745, PETRI_PLACES=380, PETRI_TRANSITIONS=508} [2024-06-14 13:22:50,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 13:22:50,075 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 508 transitions, 8745 flow [2024-06-14 13:22:50,076 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 13:22:50,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:50,076 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 13:22:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:22:50,076 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 13:22:50,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2047774022, now seen corresponding path program 2 times [2024-06-14 13:22:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:50,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246038750] [2024-06-14 13:22:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:53,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:53,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246038750] [2024-06-14 13:22:53,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246038750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:53,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:53,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128495128] [2024-06-14 13:22:53,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:53,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:53,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:22:53,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 508 transitions, 8745 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 13:22:53,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:53,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:22:53,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:56,019 INFO L124 PetriNetUnfolderBase]: 3182/5157 cut-off events. [2024-06-14 13:22:56,020 INFO L125 PetriNetUnfolderBase]: For 855651/855653 co-relation queries the response was YES. [2024-06-14 13:22:56,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 5157 events. 3182/5157 cut-off events. For 855651/855653 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31523 event pairs, 619 based on Foata normal form. 2/5156 useless extension candidates. Maximal degree in co-relation 47271. Up to 3875 conditions per place. [2024-06-14 13:22:56,282 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 293 changer transitions 0/557 dead transitions. [2024-06-14 13:22:56,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 557 transitions, 11075 flow [2024-06-14 13:22:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:22:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:22:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:22:56,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:22:56,284 INFO L175 Difference]: Start difference. First operand has 380 places, 508 transitions, 8745 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:22:56,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 557 transitions, 11075 flow [2024-06-14 13:22:59,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 557 transitions, 10605 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:59,390 INFO L231 Difference]: Finished difference. Result has 388 places, 517 transitions, 9239 flow [2024-06-14 13:22:59,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8275, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9239, PETRI_PLACES=388, PETRI_TRANSITIONS=517} [2024-06-14 13:22:59,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-14 13:22:59,391 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 517 transitions, 9239 flow [2024-06-14 13:22:59,391 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 13:22:59,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:59,391 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 13:22:59,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:22:59,391 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 13:22:59,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2047774208, now seen corresponding path program 6 times [2024-06-14 13:22:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:59,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420477852] [2024-06-14 13:22:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:03,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420477852] [2024-06-14 13:23:03,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420477852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:03,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:03,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787212592] [2024-06-14 13:23:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:03,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 517 transitions, 9239 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 13:23:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:03,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:06,445 INFO L124 PetriNetUnfolderBase]: 3187/5164 cut-off events. [2024-06-14 13:23:06,445 INFO L125 PetriNetUnfolderBase]: For 872486/872488 co-relation queries the response was YES. [2024-06-14 13:23:06,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48711 conditions, 5164 events. 3187/5164 cut-off events. For 872486/872488 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31639 event pairs, 647 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 48528. Up to 4374 conditions per place. [2024-06-14 13:23:06,528 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 342 selfloop transitions, 202 changer transitions 0/549 dead transitions. [2024-06-14 13:23:06,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 549 transitions, 10669 flow [2024-06-14 13:23:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:23:06,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:23:06,530 INFO L175 Difference]: Start difference. First operand has 388 places, 517 transitions, 9239 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:23:06,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 549 transitions, 10669 flow [2024-06-14 13:23:10,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 549 transitions, 10274 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:10,183 INFO L231 Difference]: Finished difference. Result has 391 places, 520 transitions, 9308 flow [2024-06-14 13:23:10,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9308, PETRI_PLACES=391, PETRI_TRANSITIONS=520} [2024-06-14 13:23:10,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-14 13:23:10,184 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 520 transitions, 9308 flow [2024-06-14 13:23:10,184 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 13:23:10,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:10,184 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] [2024-06-14 13:23:10,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:23:10,184 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 13:23:10,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash -813200096, now seen corresponding path program 3 times [2024-06-14 13:23:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:10,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546794713] [2024-06-14 13:23:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:14,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:14,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546794713] [2024-06-14 13:23:14,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546794713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:14,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:14,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143112136] [2024-06-14 13:23:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:14,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:14,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 520 transitions, 9308 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 13:23:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:16,434 INFO L124 PetriNetUnfolderBase]: 3213/5194 cut-off events. [2024-06-14 13:23:16,434 INFO L125 PetriNetUnfolderBase]: For 902949/902951 co-relation queries the response was YES. [2024-06-14 13:23:16,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49285 conditions, 5194 events. 3213/5194 cut-off events. For 902949/902951 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 31687 event pairs, 617 based on Foata normal form. 2/5193 useless extension candidates. Maximal degree in co-relation 49100. Up to 3894 conditions per place. [2024-06-14 13:23:16,521 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 297 changer transitions 0/561 dead transitions. [2024-06-14 13:23:16,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 561 transitions, 11548 flow [2024-06-14 13:23:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:23:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:23:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:23:16,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 13:23:16,522 INFO L175 Difference]: Start difference. First operand has 391 places, 520 transitions, 9308 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:23:16,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 561 transitions, 11548 flow [2024-06-14 13:23:19,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 561 transitions, 11287 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:19,511 INFO L231 Difference]: Finished difference. Result has 396 places, 526 transitions, 9783 flow [2024-06-14 13:23:19,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9783, PETRI_PLACES=396, PETRI_TRANSITIONS=526} [2024-06-14 13:23:19,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 13:23:19,511 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 526 transitions, 9783 flow [2024-06-14 13:23:19,512 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 13:23:19,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:19,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:23:19,512 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 13:23:19,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 51782962, now seen corresponding path program 7 times [2024-06-14 13:23:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:19,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082006043] [2024-06-14 13:23:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:23,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:23,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082006043] [2024-06-14 13:23:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082006043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:23,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:23,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679607516] [2024-06-14 13:23:23,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:23,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:23,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:23,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 526 transitions, 9783 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 13:23:23,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:23,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:25,866 INFO L124 PetriNetUnfolderBase]: 3218/5213 cut-off events. [2024-06-14 13:23:25,866 INFO L125 PetriNetUnfolderBase]: For 917048/917050 co-relation queries the response was YES. [2024-06-14 13:23:25,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49950 conditions, 5213 events. 3218/5213 cut-off events. For 917048/917050 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31911 event pairs, 648 based on Foata normal form. 1/5211 useless extension candidates. Maximal degree in co-relation 49764. Up to 4416 conditions per place. [2024-06-14 13:23:25,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 345 selfloop transitions, 205 changer transitions 0/555 dead transitions. [2024-06-14 13:23:25,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 555 transitions, 11439 flow [2024-06-14 13:23:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:23:25,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 13:23:25,956 INFO L175 Difference]: Start difference. First operand has 396 places, 526 transitions, 9783 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:23:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 555 transitions, 11439 flow [2024-06-14 13:23:29,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 555 transitions, 10850 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:29,433 INFO L231 Difference]: Finished difference. Result has 398 places, 529 transitions, 9670 flow [2024-06-14 13:23:29,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9200, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9670, PETRI_PLACES=398, PETRI_TRANSITIONS=529} [2024-06-14 13:23:29,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 13:23:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 529 transitions, 9670 flow [2024-06-14 13:23:29,434 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 13:23:29,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:29,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:29,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:23:29,435 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 13:23:29,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash 51783334, now seen corresponding path program 2 times [2024-06-14 13:23:29,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:29,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068125796] [2024-06-14 13:23:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:33,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068125796] [2024-06-14 13:23:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068125796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:33,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762830973] [2024-06-14 13:23:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:33,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:33,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:33,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 529 transitions, 9670 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 13:23:33,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:33,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:33,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:35,858 INFO L124 PetriNetUnfolderBase]: 3244/5242 cut-off events. [2024-06-14 13:23:35,859 INFO L125 PetriNetUnfolderBase]: For 949000/949006 co-relation queries the response was YES. [2024-06-14 13:23:35,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50169 conditions, 5242 events. 3244/5242 cut-off events. For 949000/949006 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32041 event pairs, 621 based on Foata normal form. 8/5248 useless extension candidates. Maximal degree in co-relation 49982. Up to 4591 conditions per place. [2024-06-14 13:23:35,935 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 428 selfloop transitions, 139 changer transitions 0/572 dead transitions. [2024-06-14 13:23:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 572 transitions, 11436 flow [2024-06-14 13:23:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:23:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:23:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-14 13:23:35,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:23:35,937 INFO L175 Difference]: Start difference. First operand has 398 places, 529 transitions, 9670 flow. Second operand 13 states and 208 transitions. [2024-06-14 13:23:35,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 572 transitions, 11436 flow [2024-06-14 13:23:39,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 572 transitions, 11164 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:39,338 INFO L231 Difference]: Finished difference. Result has 406 places, 535 transitions, 9784 flow [2024-06-14 13:23:39,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9398, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9784, PETRI_PLACES=406, PETRI_TRANSITIONS=535} [2024-06-14 13:23:39,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:23:39,339 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 535 transitions, 9784 flow [2024-06-14 13:23:39,339 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 13:23:39,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:39,339 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 13:23:39,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:23:39,339 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 13:23:39,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 51777568, now seen corresponding path program 4 times [2024-06-14 13:23:39,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:39,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775464012] [2024-06-14 13:23:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775464012] [2024-06-14 13:23:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775464012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:43,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093244700] [2024-06-14 13:23:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:43,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:43,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:43,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:43,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 535 transitions, 9784 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 13:23:43,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:43,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:43,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:46,005 INFO L124 PetriNetUnfolderBase]: 3238/5243 cut-off events. [2024-06-14 13:23:46,005 INFO L125 PetriNetUnfolderBase]: For 954525/954527 co-relation queries the response was YES. [2024-06-14 13:23:46,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49944 conditions, 5243 events. 3238/5243 cut-off events. For 954525/954527 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32052 event pairs, 620 based on Foata normal form. 2/5242 useless extension candidates. Maximal degree in co-relation 49756. Up to 3910 conditions per place. [2024-06-14 13:23:46,090 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 262 selfloop transitions, 305 changer transitions 0/572 dead transitions. [2024-06-14 13:23:46,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 572 transitions, 11720 flow [2024-06-14 13:23:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:23:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:23:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-14 13:23:46,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-14 13:23:46,091 INFO L175 Difference]: Start difference. First operand has 406 places, 535 transitions, 9784 flow. Second operand 13 states and 215 transitions. [2024-06-14 13:23:46,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 572 transitions, 11720 flow [2024-06-14 13:23:49,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 572 transitions, 11368 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-14 13:23:49,342 INFO L231 Difference]: Finished difference. Result has 409 places, 535 transitions, 10048 flow [2024-06-14 13:23:49,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9432, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10048, PETRI_PLACES=409, PETRI_TRANSITIONS=535} [2024-06-14 13:23:49,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 13:23:49,343 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 535 transitions, 10048 flow [2024-06-14 13:23:49,343 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 13:23:49,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:49,344 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 13:23:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:23:49,344 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 13:23:49,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash 51788914, now seen corresponding path program 3 times [2024-06-14 13:23:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:49,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350077427] [2024-06-14 13:23:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:49,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350077427] [2024-06-14 13:23:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350077427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:53,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:53,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:53,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8204012] [2024-06-14 13:23:53,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:53,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:53,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:53,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:23:53,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 535 transitions, 10048 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 13:23:53,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:53,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:23:53,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:55,737 INFO L124 PetriNetUnfolderBase]: 3232/5228 cut-off events. [2024-06-14 13:23:55,737 INFO L125 PetriNetUnfolderBase]: For 960980/960986 co-relation queries the response was YES. [2024-06-14 13:23:55,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50213 conditions, 5228 events. 3232/5228 cut-off events. For 960980/960986 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31978 event pairs, 622 based on Foata normal form. 8/5234 useless extension candidates. Maximal degree in co-relation 50024. Up to 4578 conditions per place. [2024-06-14 13:23:55,813 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 427 selfloop transitions, 139 changer transitions 0/571 dead transitions. [2024-06-14 13:23:55,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 571 transitions, 11496 flow [2024-06-14 13:23:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:23:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:23:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-14 13:23:55,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.370304114490161 [2024-06-14 13:23:55,815 INFO L175 Difference]: Start difference. First operand has 409 places, 535 transitions, 10048 flow. Second operand 13 states and 207 transitions. [2024-06-14 13:23:55,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 571 transitions, 11496 flow [2024-06-14 13:23:59,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 571 transitions, 10860 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-14 13:23:59,223 INFO L231 Difference]: Finished difference. Result has 410 places, 535 transitions, 9696 flow [2024-06-14 13:23:59,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9412, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9696, PETRI_PLACES=410, PETRI_TRANSITIONS=535} [2024-06-14 13:23:59,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-14 13:23:59,223 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 535 transitions, 9696 flow [2024-06-14 13:23:59,224 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 13:23:59,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:59,224 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 13:23:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:23:59,224 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 13:23:59,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 51777382, now seen corresponding path program 8 times [2024-06-14 13:23:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:59,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902724219] [2024-06-14 13:23:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:03,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902724219] [2024-06-14 13:24:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902724219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:03,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286970793] [2024-06-14 13:24:03,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:03,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:03,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:03,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 535 transitions, 9696 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 13:24:03,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:03,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:03,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:05,763 INFO L124 PetriNetUnfolderBase]: 3229/5233 cut-off events. [2024-06-14 13:24:05,763 INFO L125 PetriNetUnfolderBase]: For 960949/960951 co-relation queries the response was YES. [2024-06-14 13:24:05,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49676 conditions, 5233 events. 3229/5233 cut-off events. For 960949/960951 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32120 event pairs, 649 based on Foata normal form. 1/5231 useless extension candidates. Maximal degree in co-relation 49486. Up to 4433 conditions per place. [2024-06-14 13:24:05,845 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 205 changer transitions 0/560 dead transitions. [2024-06-14 13:24:05,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 560 transitions, 11094 flow [2024-06-14 13:24:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:24:05,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:24:05,847 INFO L175 Difference]: Start difference. First operand has 410 places, 535 transitions, 9696 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:24:05,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 560 transitions, 11094 flow [2024-06-14 13:24:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 560 transitions, 10806 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 13:24:09,105 INFO L231 Difference]: Finished difference. Result has 407 places, 535 transitions, 9824 flow [2024-06-14 13:24:09,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9408, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9824, PETRI_PLACES=407, PETRI_TRANSITIONS=535} [2024-06-14 13:24:09,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 13:24:09,105 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 535 transitions, 9824 flow [2024-06-14 13:24:09,105 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 13:24:09,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:09,105 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 13:24:09,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:24:09,105 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 13:24:09,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:09,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1894629062, now seen corresponding path program 5 times [2024-06-14 13:24:09,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:09,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165375042] [2024-06-14 13:24:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:09,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165375042] [2024-06-14 13:24:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165375042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446233345] [2024-06-14 13:24:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:12,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:12,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 535 transitions, 9824 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 13:24:12,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:12,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:12,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:15,140 INFO L124 PetriNetUnfolderBase]: 3271/5300 cut-off events. [2024-06-14 13:24:15,140 INFO L125 PetriNetUnfolderBase]: For 1008229/1008231 co-relation queries the response was YES. [2024-06-14 13:24:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50953 conditions, 5300 events. 3271/5300 cut-off events. For 1008229/1008231 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32557 event pairs, 601 based on Foata normal form. 2/5301 useless extension candidates. Maximal degree in co-relation 50762. Up to 4653 conditions per place. [2024-06-14 13:24:15,218 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 459 selfloop transitions, 111 changer transitions 0/575 dead transitions. [2024-06-14 13:24:15,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 575 transitions, 11679 flow [2024-06-14 13:24:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:24:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:24:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-14 13:24:15,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:24:15,219 INFO L175 Difference]: Start difference. First operand has 407 places, 535 transitions, 9824 flow. Second operand 12 states and 195 transitions. [2024-06-14 13:24:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 575 transitions, 11679 flow [2024-06-14 13:24:19,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 575 transitions, 11095 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:24:19,132 INFO L231 Difference]: Finished difference. Result has 411 places, 544 transitions, 9704 flow [2024-06-14 13:24:19,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9240, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9704, PETRI_PLACES=411, PETRI_TRANSITIONS=544} [2024-06-14 13:24:19,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 13:24:19,133 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 544 transitions, 9704 flow [2024-06-14 13:24:19,133 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 13:24:19,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:19,133 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 13:24:19,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:24:19,133 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 13:24:19,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2117212714, now seen corresponding path program 6 times [2024-06-14 13:24:19,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651820086] [2024-06-14 13:24:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:19,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:22,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:22,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651820086] [2024-06-14 13:24:22,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651820086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:22,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:22,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163339263] [2024-06-14 13:24:22,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:22,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:22,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:22,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 544 transitions, 9704 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 13:24:22,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:22,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:22,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:25,387 INFO L124 PetriNetUnfolderBase]: 3281/5316 cut-off events. [2024-06-14 13:24:25,387 INFO L125 PetriNetUnfolderBase]: For 1021446/1021448 co-relation queries the response was YES. [2024-06-14 13:24:25,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51089 conditions, 5316 events. 3281/5316 cut-off events. For 1021446/1021448 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32700 event pairs, 610 based on Foata normal form. 2/5317 useless extension candidates. Maximal degree in co-relation 50896. Up to 4659 conditions per place. [2024-06-14 13:24:25,461 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 460 selfloop transitions, 112 changer transitions 0/577 dead transitions. [2024-06-14 13:24:25,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 577 transitions, 11450 flow [2024-06-14 13:24:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:24:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:24:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-14 13:24:25,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 13:24:25,463 INFO L175 Difference]: Start difference. First operand has 411 places, 544 transitions, 9704 flow. Second operand 12 states and 194 transitions. [2024-06-14 13:24:25,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 577 transitions, 11450 flow [2024-06-14 13:24:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 577 transitions, 11284 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:28,690 INFO L231 Difference]: Finished difference. Result has 416 places, 547 transitions, 9848 flow [2024-06-14 13:24:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9538, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9848, PETRI_PLACES=416, PETRI_TRANSITIONS=547} [2024-06-14 13:24:28,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:24:28,691 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 547 transitions, 9848 flow [2024-06-14 13:24:28,691 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 13:24:28,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:28,691 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 13:24:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:24:28,691 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 13:24:28,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -842409954, now seen corresponding path program 9 times [2024-06-14 13:24:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522250766] [2024-06-14 13:24:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:33,096 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 13:24:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:33,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522250766] [2024-06-14 13:24:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522250766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:33,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:33,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:24:33,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546330672] [2024-06-14 13:24:33,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:33,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:24:33,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:24:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:24:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 547 transitions, 9848 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 13:24:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:35,349 INFO L124 PetriNetUnfolderBase]: 3278/5316 cut-off events. [2024-06-14 13:24:35,349 INFO L125 PetriNetUnfolderBase]: For 1023059/1023061 co-relation queries the response was YES. [2024-06-14 13:24:35,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51288 conditions, 5316 events. 3278/5316 cut-off events. For 1023059/1023061 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32688 event pairs, 635 based on Foata normal form. 1/5316 useless extension candidates. Maximal degree in co-relation 51093. Up to 4857 conditions per place. [2024-06-14 13:24:35,442 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 496 selfloop transitions, 68 changer transitions 0/569 dead transitions. [2024-06-14 13:24:35,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 569 transitions, 11260 flow [2024-06-14 13:24:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:24:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:24:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:24:35,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-14 13:24:35,443 INFO L175 Difference]: Start difference. First operand has 416 places, 547 transitions, 9848 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:24:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 569 transitions, 11260 flow [2024-06-14 13:24:38,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 569 transitions, 11019 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 13:24:38,628 INFO L231 Difference]: Finished difference. Result has 417 places, 547 transitions, 9749 flow [2024-06-14 13:24:38,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9607, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9749, PETRI_PLACES=417, PETRI_TRANSITIONS=547} [2024-06-14 13:24:38,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 13:24:38,629 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 547 transitions, 9749 flow [2024-06-14 13:24:38,629 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 13:24:38,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:38,629 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 13:24:38,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:24:38,629 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 13:24:38,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1255250388, now seen corresponding path program 4 times [2024-06-14 13:24:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:38,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677396916] [2024-06-14 13:24:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:41,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677396916] [2024-06-14 13:24:41,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677396916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:41,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:41,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400113870] [2024-06-14 13:24:41,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:41,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:41,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:41,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:41,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 547 transitions, 9749 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 13:24:41,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:41,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:41,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:44,347 INFO L124 PetriNetUnfolderBase]: 3292/5336 cut-off events. [2024-06-14 13:24:44,348 INFO L125 PetriNetUnfolderBase]: For 1064606/1064608 co-relation queries the response was YES. [2024-06-14 13:24:44,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51213 conditions, 5336 events. 3292/5336 cut-off events. For 1064606/1064608 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32828 event pairs, 606 based on Foata normal form. 6/5341 useless extension candidates. Maximal degree in co-relation 51017. Up to 4739 conditions per place. [2024-06-14 13:24:44,436 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 469 selfloop transitions, 106 changer transitions 0/580 dead transitions. [2024-06-14 13:24:44,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 580 transitions, 11356 flow [2024-06-14 13:24:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:24:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:24:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:24:44,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054968287526425 [2024-06-14 13:24:44,438 INFO L175 Difference]: Start difference. First operand has 417 places, 547 transitions, 9749 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:24:44,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 580 transitions, 11356 flow [2024-06-14 13:24:48,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 580 transitions, 11210 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:24:48,425 INFO L231 Difference]: Finished difference. Result has 420 places, 553 transitions, 9992 flow [2024-06-14 13:24:48,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9603, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9992, PETRI_PLACES=420, PETRI_TRANSITIONS=553} [2024-06-14 13:24:48,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 13:24:48,425 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 553 transitions, 9992 flow [2024-06-14 13:24:48,425 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 13:24:48,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:48,425 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 13:24:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:24:48,426 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 13:24:48,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash -842404374, now seen corresponding path program 10 times [2024-06-14 13:24:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:48,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925476647] [2024-06-14 13:24:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:51,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925476647] [2024-06-14 13:24:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925476647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993837425] [2024-06-14 13:24:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:51,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:51,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:51,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:51,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:51,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:24:51,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 553 transitions, 9992 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 13:24:51,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:51,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:24:51,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:53,939 INFO L124 PetriNetUnfolderBase]: 3289/5336 cut-off events. [2024-06-14 13:24:53,939 INFO L125 PetriNetUnfolderBase]: For 1041465/1041467 co-relation queries the response was YES. [2024-06-14 13:24:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51378 conditions, 5336 events. 3289/5336 cut-off events. For 1041465/1041467 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32900 event pairs, 634 based on Foata normal form. 1/5336 useless extension candidates. Maximal degree in co-relation 51181. Up to 4874 conditions per place. [2024-06-14 13:24:54,018 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 500 selfloop transitions, 68 changer transitions 0/573 dead transitions. [2024-06-14 13:24:54,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 573 transitions, 11180 flow [2024-06-14 13:24:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:24:54,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:24:54,019 INFO L175 Difference]: Start difference. First operand has 420 places, 553 transitions, 9992 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:24:54,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 573 transitions, 11180 flow [2024-06-14 13:24:57,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 573 transitions, 10977 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:24:57,983 INFO L231 Difference]: Finished difference. Result has 421 places, 553 transitions, 9931 flow [2024-06-14 13:24:57,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9789, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9931, PETRI_PLACES=421, PETRI_TRANSITIONS=553} [2024-06-14 13:24:57,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:24:57,983 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 553 transitions, 9931 flow [2024-06-14 13:24:57,983 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 13:24:57,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:57,983 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 13:24:57,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:24:57,984 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 13:24:57,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -842404002, now seen corresponding path program 5 times [2024-06-14 13:24:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:57,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902114300] [2024-06-14 13:24:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902114300] [2024-06-14 13:25:01,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902114300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:01,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106933568] [2024-06-14 13:25:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:01,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:01,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 553 transitions, 9931 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 13:25:01,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:01,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:01,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:03,522 INFO L124 PetriNetUnfolderBase]: 3277/5310 cut-off events. [2024-06-14 13:25:03,522 INFO L125 PetriNetUnfolderBase]: For 1052386/1052388 co-relation queries the response was YES. [2024-06-14 13:25:03,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50741 conditions, 5310 events. 3277/5310 cut-off events. For 1052386/1052388 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32684 event pairs, 602 based on Foata normal form. 4/5313 useless extension candidates. Maximal degree in co-relation 50543. Up to 4725 conditions per place. [2024-06-14 13:25:03,607 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 469 selfloop transitions, 106 changer transitions 0/580 dead transitions. [2024-06-14 13:25:03,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 580 transitions, 11147 flow [2024-06-14 13:25:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:25:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:25:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:25:03,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054968287526425 [2024-06-14 13:25:03,608 INFO L175 Difference]: Start difference. First operand has 421 places, 553 transitions, 9931 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:25:03,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 580 transitions, 11147 flow [2024-06-14 13:25:07,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 580 transitions, 10983 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:25:07,724 INFO L231 Difference]: Finished difference. Result has 424 places, 553 transitions, 9990 flow [2024-06-14 13:25:07,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9990, PETRI_PLACES=424, PETRI_TRANSITIONS=553} [2024-06-14 13:25:07,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 13:25:07,725 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 553 transitions, 9990 flow [2024-06-14 13:25:07,725 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 13:25:07,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:07,725 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 13:25:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:25:07,726 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 13:25:07,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1247898552, now seen corresponding path program 7 times [2024-06-14 13:25:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59090138] [2024-06-14 13:25:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:07,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:11,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59090138] [2024-06-14 13:25:11,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59090138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:11,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:11,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91251782] [2024-06-14 13:25:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:11,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:11,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:11,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 553 transitions, 9990 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 13:25:11,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:11,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:11,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:13,620 INFO L124 PetriNetUnfolderBase]: 3271/5304 cut-off events. [2024-06-14 13:25:13,620 INFO L125 PetriNetUnfolderBase]: For 1041595/1041597 co-relation queries the response was YES. [2024-06-14 13:25:13,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50693 conditions, 5304 events. 3271/5304 cut-off events. For 1041595/1041597 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32679 event pairs, 596 based on Foata normal form. 2/5305 useless extension candidates. Maximal degree in co-relation 50494. Up to 4655 conditions per place. [2024-06-14 13:25:13,707 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 458 selfloop transitions, 120 changer transitions 0/583 dead transitions. [2024-06-14 13:25:13,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 583 transitions, 11454 flow [2024-06-14 13:25:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:25:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:25:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-14 13:25:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 13:25:13,709 INFO L175 Difference]: Start difference. First operand has 424 places, 553 transitions, 9990 flow. Second operand 12 states and 194 transitions. [2024-06-14 13:25:13,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 583 transitions, 11454 flow [2024-06-14 13:25:16,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 583 transitions, 11111 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-14 13:25:16,891 INFO L231 Difference]: Finished difference. Result has 424 places, 553 transitions, 9893 flow [2024-06-14 13:25:16,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9647, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9893, PETRI_PLACES=424, PETRI_TRANSITIONS=553} [2024-06-14 13:25:16,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 13:25:16,892 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 553 transitions, 9893 flow [2024-06-14 13:25:16,892 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 13:25:16,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:16,892 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 13:25:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:25:16,892 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 13:25:16,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -901828488, now seen corresponding path program 4 times [2024-06-14 13:25:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124722773] [2024-06-14 13:25:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124722773] [2024-06-14 13:25:20,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124722773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:20,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:20,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935590869] [2024-06-14 13:25:20,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:20,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:20,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 553 transitions, 9893 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 13:25:20,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:20,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:20,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:22,915 INFO L124 PetriNetUnfolderBase]: 3253/5281 cut-off events. [2024-06-14 13:25:22,915 INFO L125 PetriNetUnfolderBase]: For 1043121/1043127 co-relation queries the response was YES. [2024-06-14 13:25:22,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49592 conditions, 5281 events. 3253/5281 cut-off events. For 1043121/1043127 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32449 event pairs, 463 based on Foata normal form. 14/5294 useless extension candidates. Maximal degree in co-relation 49392. Up to 4453 conditions per place. [2024-06-14 13:25:23,000 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 512 selfloop transitions, 81 changer transitions 0/598 dead transitions. [2024-06-14 13:25:23,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 598 transitions, 11249 flow [2024-06-14 13:25:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:25:23,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 13:25:23,001 INFO L175 Difference]: Start difference. First operand has 424 places, 553 transitions, 9893 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:25:23,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 598 transitions, 11249 flow [2024-06-14 13:25:27,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 598 transitions, 10987 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 13:25:27,416 INFO L231 Difference]: Finished difference. Result has 423 places, 553 transitions, 9803 flow [2024-06-14 13:25:27,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9631, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9803, PETRI_PLACES=423, PETRI_TRANSITIONS=553} [2024-06-14 13:25:27,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 13:25:27,416 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 553 transitions, 9803 flow [2024-06-14 13:25:27,416 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 13:25:27,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:27,416 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 13:25:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:25:27,417 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 13:25:27,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 208236762, now seen corresponding path program 11 times [2024-06-14 13:25:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410090145] [2024-06-14 13:25:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410090145] [2024-06-14 13:25:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410090145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:30,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:30,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701533529] [2024-06-14 13:25:30,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:30,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:30,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 553 transitions, 9803 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 13:25:30,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:30,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:30,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:33,157 INFO L124 PetriNetUnfolderBase]: 3258/5289 cut-off events. [2024-06-14 13:25:33,157 INFO L125 PetriNetUnfolderBase]: For 1011130/1011146 co-relation queries the response was YES. [2024-06-14 13:25:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49797 conditions, 5289 events. 3258/5289 cut-off events. For 1011130/1011146 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32601 event pairs, 694 based on Foata normal form. 7/5294 useless extension candidates. Maximal degree in co-relation 49596. Up to 4475 conditions per place. [2024-06-14 13:25:33,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 376 selfloop transitions, 201 changer transitions 0/582 dead transitions. [2024-06-14 13:25:33,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 582 transitions, 11574 flow [2024-06-14 13:25:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:25:33,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:25:33,251 INFO L175 Difference]: Start difference. First operand has 423 places, 553 transitions, 9803 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:25:33,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 582 transitions, 11574 flow [2024-06-14 13:25:37,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 582 transitions, 11424 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:25:37,956 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 10140 flow [2024-06-14 13:25:37,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9665, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10140, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-14 13:25:37,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 13:25:37,957 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 10140 flow [2024-06-14 13:25:37,957 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 13:25:37,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:37,957 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 13:25:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:25:37,957 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 13:25:37,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1306385576, now seen corresponding path program 12 times [2024-06-14 13:25:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:37,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450245911] [2024-06-14 13:25:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450245911] [2024-06-14 13:25:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450245911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:41,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67465293] [2024-06-14 13:25:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:41,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:25:41,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 10140 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 13:25:41,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:41,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:25:41,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:43,601 INFO L124 PetriNetUnfolderBase]: 3263/5306 cut-off events. [2024-06-14 13:25:43,601 INFO L125 PetriNetUnfolderBase]: For 981319/981335 co-relation queries the response was YES. [2024-06-14 13:25:43,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49819 conditions, 5306 events. 3263/5306 cut-off events. For 981319/981335 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32808 event pairs, 700 based on Foata normal form. 7/5311 useless extension candidates. Maximal degree in co-relation 49618. Up to 4481 conditions per place. [2024-06-14 13:25:43,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 201 changer transitions 0/581 dead transitions. [2024-06-14 13:25:43,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 581 transitions, 11895 flow [2024-06-14 13:25:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:25:43,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:25:43,691 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 10140 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:25:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 581 transitions, 11895 flow [2024-06-14 13:25:47,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 581 transitions, 11144 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:47,537 INFO L231 Difference]: Finished difference. Result has 424 places, 559 transitions, 9870 flow [2024-06-14 13:25:47,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9870, PETRI_PLACES=424, PETRI_TRANSITIONS=559} [2024-06-14 13:25:47,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 13:25:47,538 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 559 transitions, 9870 flow [2024-06-14 13:25:47,538 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 13:25:47,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:47,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:25:47,538 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 13:25:47,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1306385204, now seen corresponding path program 6 times [2024-06-14 13:25:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:47,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415754841] [2024-06-14 13:25:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15