./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_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/safe012_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe012_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_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-76401ed-m [2024-06-20 17:00:31,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:00:31,141 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:00:31,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:00:31,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:00:31,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:00:31,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:00:31,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:00:31,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:00:31,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:00:31,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:00:31,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:00:31,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:00:31,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:00:31,178 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:00:31,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:00:31,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:00:31,179 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:00:31,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:00:31,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:00:31,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:00:31,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:00:31,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:00:31,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:00:31,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:00:31,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:00:31,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:00:31,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:00:31,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:00:31,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:00:31,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:00:31,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:00:31,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:00:31,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:00:31,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:00:31,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:00:31,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:00:31,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:00:31,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:00:31,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:00:31,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:00:31,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:00:31,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:00:31,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:00:31,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:00:31,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:00:31,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:00:31,468 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:00:31,469 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:00:31,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-20 17:00:32,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:00:32,760 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:00:32,761 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-20 17:00:32,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116742821/3a8c0cd2d7d5400ea64d2503e8f80ef8/FLAGe45f92b59 [2024-06-20 17:00:32,784 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116742821/3a8c0cd2d7d5400ea64d2503e8f80ef8 [2024-06-20 17:00:32,786 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:00:32,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:00:32,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_rmo.oepc.yml/witness.yml [2024-06-20 17:00:33,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:00:33,036 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:00:33,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:00:33,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:00:33,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:00:33,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:00:32" (1/2) ... [2024-06-20 17:00:33,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51af3040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:00:33, skipping insertion in model container [2024-06-20 17:00:33,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:00:32" (1/2) ... [2024-06-20 17:00:33,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4408d28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:00:33, skipping insertion in model container [2024-06-20 17:00:33,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:00:33" (2/2) ... [2024-06-20 17:00:33,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51af3040 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33, skipping insertion in model container [2024-06-20 17:00:33,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:00:33" (2/2) ... [2024-06-20 17:00:33,044 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:00:33,145 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:00:33,146 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$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 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:00:33,147 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! 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 == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:00:33,147 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$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 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-20 17:00:33,147 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:00:33,147 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-20 17:00:33,175 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:00:33,481 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:00:33,492 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:00:33,592 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:00:33,620 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:00:33,620 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33 WrapperNode [2024-06-20 17:00:33,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:00:33,621 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:00:33,621 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:00:33,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:00:33,627 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 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,666 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 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,696 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-20 17:00:33,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:00:33,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:00:33,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:00:33,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:00:33,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,778 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]. [2024-06-20 17:00:33,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,855 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:00:33,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:00:33,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:00:33,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:00:33,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (1/1) ... [2024-06-20 17:00:33,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:00:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:00:33,911 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) [2024-06-20 17:00:33,929 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 [2024-06-20 17:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:00:33,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:00:33,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:00:33,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:00:33,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:00:33,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:00:33,943 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:00:33,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:00:33,943 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:00:33,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:00:33,943 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:00:33,944 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:00:33,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:00:33,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:00:33,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:00:33,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:00:33,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:00:33,947 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:00:34,068 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:00:34,069 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:00:34,474 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:00:34,474 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:00:34,812 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:00:34,812 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:00:34,813 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:00:34 BoogieIcfgContainer [2024-06-20 17:00:34,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:00:34,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:00:34,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:00:34,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:00:34,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:00:32" (1/4) ... [2024-06-20 17:00:34,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218f780a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:00:34, skipping insertion in model container [2024-06-20 17:00:34,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:00:33" (2/4) ... [2024-06-20 17:00:34,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218f780a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:00:34, skipping insertion in model container [2024-06-20 17:00:34,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:00:33" (3/4) ... [2024-06-20 17:00:34,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218f780a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:00:34, skipping insertion in model container [2024-06-20 17:00:34,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:00:34" (4/4) ... [2024-06-20 17:00:34,819 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-20 17:00:34,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:00:34,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:00:34,833 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:00:34,879 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:00:34,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:00:34,935 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:00:34,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:00:34,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:00:34,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:00:34,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:00:34,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:00:34,958 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;@149f9ec1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:00:34,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:00:34,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:00:34,966 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:00:34,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:00:34,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:34,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:00:34,967 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)] === [2024-06-20 17:00:34,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 639325454, now seen corresponding path program 1 times [2024-06-20 17:00:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:34,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065259756] [2024-06-20 17:00:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:34,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:36,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065259756] [2024-06-20 17:00:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065259756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:00:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032188951] [2024-06-20 17:00:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:37,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:00:37,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:00:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:00:37,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 17:00:37,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:37,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:37,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 17:00:37,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:37,491 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-20 17:00:37,492 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 17:00:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5951 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-20 17:00:37,501 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:00:37,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-20 17:00:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:00:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:00:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-20 17:00:37,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-20 17:00:37,510 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-20 17:00:37,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-20 17:00:37,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:00:37,514 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:00:37,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 17:00:37,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:00:37,517 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:00:37,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:37,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:37,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:37,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:00:37,518 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)] === [2024-06-20 17:00:37,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash 211464525, now seen corresponding path program 1 times [2024-06-20 17:00:37,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180980692] [2024-06-20 17:00:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:37,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180980692] [2024-06-20 17:00:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180980692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:39,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:39,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:00:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161966180] [2024-06-20 17:00:39,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:00:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:00:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:00:39,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 17:00:39,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:39,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:39,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 17:00:39,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:39,836 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-20 17:00:39,837 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-20 17:00:39,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5929 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-20 17:00:39,843 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 17:00:39,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-20 17:00:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:00:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:00:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-20 17:00:39,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:00:39,845 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-20 17:00:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-20 17:00:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:00:39,847 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 17:00:39,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 17:00:39,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 17:00:39,848 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 17:00:39,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:39,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:39,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:00:39,849 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)] === [2024-06-20 17:00:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash -976473171, now seen corresponding path program 1 times [2024-06-20 17:00:39,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:39,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635309429] [2024-06-20 17:00:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:42,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635309429] [2024-06-20 17:00:42,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635309429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:42,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:42,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:00:42,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618918938] [2024-06-20 17:00:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:00:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:00:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:00:42,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 17:00:42,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:42,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:42,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 17:00:42,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:43,115 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-20 17:00:43,115 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-20 17:00:43,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7199 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-20 17:00:43,125 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 17:00:43,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-20 17:00:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:00:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:00:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 17:00:43,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 17:00:43,130 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-20 17:00:43,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-20 17:00:43,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:00:43,133 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 17:00:43,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 17:00:43,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 17:00:43,135 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 17:00:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:43,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:43,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:43,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:00:43,136 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)] === [2024-06-20 17:00:43,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash -590331011, now seen corresponding path program 1 times [2024-06-20 17:00:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:43,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561641926] [2024-06-20 17:00:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:44,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561641926] [2024-06-20 17:00:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561641926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:44,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:44,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:00:44,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974741594] [2024-06-20 17:00:44,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:44,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:00:44,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:00:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:00:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:00:44,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:44,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:44,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:00:44,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:45,363 INFO L124 PetriNetUnfolderBase]: 964/1518 cut-off events. [2024-06-20 17:00:45,363 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-20 17:00:45,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 1518 events. 964/1518 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7136 event pairs, 382 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-20 17:00:45,371 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 17:00:45,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-20 17:00:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:00:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:00:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-20 17:00:45,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 17:00:45,373 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-20 17:00:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-20 17:00:45,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:00:45,378 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 17:00:45,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 17:00:45,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 17:00:45,379 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 17:00:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:45,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:45,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:00:45,380 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)] === [2024-06-20 17:00:45,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1120390510, now seen corresponding path program 1 times [2024-06-20 17:00:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:45,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328239085] [2024-06-20 17:00:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328239085] [2024-06-20 17:00:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328239085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:47,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:00:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522141614] [2024-06-20 17:00:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:00:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:00:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:00:47,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:00:47,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:47,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:47,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:00:47,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:48,312 INFO L124 PetriNetUnfolderBase]: 1112/1732 cut-off events. [2024-06-20 17:00:48,312 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-20 17:00:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 1732 events. 1112/1732 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8137 event pairs, 451 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-20 17:00:48,322 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-20 17:00:48,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 424 flow [2024-06-20 17:00:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:00:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:00:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:00:48,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:00:48,326 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:00:48,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 424 flow [2024-06-20 17:00:48,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:00:48,335 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-20 17:00:48,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-20 17:00:48,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 17:00:48,337 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-20 17:00:48,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:48,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:48,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:00:48,338 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)] === [2024-06-20 17:00:48,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:48,338 INFO L85 PathProgramCache]: Analyzing trace with hash -732754280, now seen corresponding path program 1 times [2024-06-20 17:00:48,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:48,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276213613] [2024-06-20 17:00:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:48,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276213613] [2024-06-20 17:00:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276213613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:00:50,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590354671] [2024-06-20 17:00:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:00:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:00:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:00:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:00:50,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:50,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:50,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:00:50,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:51,751 INFO L124 PetriNetUnfolderBase]: 1067/1677 cut-off events. [2024-06-20 17:00:51,752 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-20 17:00:51,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1677 events. 1067/1677 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7977 event pairs, 390 based on Foata normal form. 14/1680 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-20 17:00:51,760 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-20 17:00:51,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 535 flow [2024-06-20 17:00:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:00:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:00:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-20 17:00:51,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-20 17:00:51,761 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 118 transitions. [2024-06-20 17:00:51,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 535 flow [2024-06-20 17:00:51,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 529 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 17:00:51,766 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-20 17:00:51,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-20 17:00:51,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 17:00:51,768 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-20 17:00:51,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:51,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:51,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:00:51,769 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)] === [2024-06-20 17:00:51,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash -359861480, now seen corresponding path program 2 times [2024-06-20 17:00:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:51,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967268976] [2024-06-20 17:00:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:53,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967268976] [2024-06-20 17:00:53,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967268976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:53,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:00:53,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375433543] [2024-06-20 17:00:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:00:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:00:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:00:54,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:00:54,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:54,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:54,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:00:54,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:54,985 INFO L124 PetriNetUnfolderBase]: 1082/1704 cut-off events. [2024-06-20 17:00:54,985 INFO L125 PetriNetUnfolderBase]: For 5157/5201 co-relation queries the response was YES. [2024-06-20 17:00:54,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 1704 events. 1082/1704 cut-off events. For 5157/5201 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8114 event pairs, 390 based on Foata normal form. 16/1711 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-20 17:00:54,994 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-20 17:00:54,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 535 flow [2024-06-20 17:00:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:00:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:00:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:00:54,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:00:54,996 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:00:54,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 535 flow [2024-06-20 17:00:55,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 502 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:00:55,002 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-20 17:00:55,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-20 17:00:55,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 17:00:55,004 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-20 17:00:55,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:55,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:00:55,005 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)] === [2024-06-20 17:00:55,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1090128123, now seen corresponding path program 1 times [2024-06-20 17:00:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308577321] [2024-06-20 17:00:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:00:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:00:57,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:00:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308577321] [2024-06-20 17:00:57,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308577321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:00:57,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:00:57,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:00:57,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948931172] [2024-06-20 17:00:57,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:00:57,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:00:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:00:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:00:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:00:57,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:00:57,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:57,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:00:57,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:00:57,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:00:58,301 INFO L124 PetriNetUnfolderBase]: 1118/1769 cut-off events. [2024-06-20 17:00:58,301 INFO L125 PetriNetUnfolderBase]: For 5970/6010 co-relation queries the response was YES. [2024-06-20 17:00:58,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6520 conditions, 1769 events. 1118/1769 cut-off events. For 5970/6010 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8477 event pairs, 385 based on Foata normal form. 16/1775 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-20 17:00:58,315 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-20 17:00:58,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 733 flow [2024-06-20 17:00:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:00:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:00:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:00:58,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 17:00:58,318 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:00:58,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 733 flow [2024-06-20 17:00:58,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 669 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:00:58,325 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 468 flow [2024-06-20 17:00:58,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-20 17:00:58,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-20 17:00:58,327 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 468 flow [2024-06-20 17:00:58,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:00:58,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:00:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:00:58,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:00:58,328 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)] === [2024-06-20 17:00:58,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:00:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1411367139, now seen corresponding path program 2 times [2024-06-20 17:00:58,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:00:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773245690] [2024-06-20 17:00:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:00:58,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:00:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:01,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:01,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773245690] [2024-06-20 17:01:01,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773245690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:01,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:01,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614916110] [2024-06-20 17:01:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:01,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:01,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:01,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:01,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:02,190 INFO L124 PetriNetUnfolderBase]: 1131/1794 cut-off events. [2024-06-20 17:01:02,191 INFO L125 PetriNetUnfolderBase]: For 7709/7762 co-relation queries the response was YES. [2024-06-20 17:01:02,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7122 conditions, 1794 events. 1131/1794 cut-off events. For 7709/7762 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8666 event pairs, 370 based on Foata normal form. 28/1812 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-20 17:01:02,201 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-20 17:01:02,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 794 flow [2024-06-20 17:01:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:01:02,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 17:01:02,203 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 468 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:01:02,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 794 flow [2024-06-20 17:01:02,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 751 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 17:01:02,210 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 528 flow [2024-06-20 17:01:02,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-20 17:01:02,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-20 17:01:02,211 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 528 flow [2024-06-20 17:01:02,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:02,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:02,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:01:02,212 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)] === [2024-06-20 17:01:02,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1411246983, now seen corresponding path program 1 times [2024-06-20 17:01:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:02,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276574025] [2024-06-20 17:01:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:04,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:04,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276574025] [2024-06-20 17:01:04,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276574025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:04,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490295361] [2024-06-20 17:01:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:04,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:04,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:04,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:04,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:04,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:04,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:06,076 INFO L124 PetriNetUnfolderBase]: 1231/1931 cut-off events. [2024-06-20 17:01:06,077 INFO L125 PetriNetUnfolderBase]: For 9721/9725 co-relation queries the response was YES. [2024-06-20 17:01:06,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7925 conditions, 1931 events. 1231/1931 cut-off events. For 9721/9725 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9249 event pairs, 407 based on Foata normal form. 6/1932 useless extension candidates. Maximal degree in co-relation 7895. Up to 1748 conditions per place. [2024-06-20 17:01:06,086 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-20 17:01:06,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 981 flow [2024-06-20 17:01:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:01:06,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:01:06,088 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 528 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:01:06,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 981 flow [2024-06-20 17:01:06,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 124 transitions, 896 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:01:06,096 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 619 flow [2024-06-20 17:01:06,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=619, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-20 17:01:06,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-20 17:01:06,096 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 619 flow [2024-06-20 17:01:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:06,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:06,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:01:06,097 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)] === [2024-06-20 17:01:06,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1528828969, now seen corresponding path program 3 times [2024-06-20 17:01:06,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:06,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955444391] [2024-06-20 17:01:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955444391] [2024-06-20 17:01:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955444391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:08,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:08,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238031603] [2024-06-20 17:01:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:08,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:08,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 619 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:08,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:08,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:08,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:09,878 INFO L124 PetriNetUnfolderBase]: 1175/1874 cut-off events. [2024-06-20 17:01:09,878 INFO L125 PetriNetUnfolderBase]: For 9930/10046 co-relation queries the response was YES. [2024-06-20 17:01:09,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 1874 events. 1175/1874 cut-off events. For 9930/10046 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9195 event pairs, 354 based on Foata normal form. 26/1859 useless extension candidates. Maximal degree in co-relation 7789. Up to 1580 conditions per place. [2024-06-20 17:01:09,888 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 44 changer transitions 0/127 dead transitions. [2024-06-20 17:01:09,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1021 flow [2024-06-20 17:01:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 17:01:09,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 17:01:09,889 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 619 flow. Second operand 7 states and 137 transitions. [2024-06-20 17:01:09,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1021 flow [2024-06-20 17:01:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 991 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:01:09,897 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 748 flow [2024-06-20 17:01:09,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=748, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-20 17:01:09,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 17:01:09,898 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 748 flow [2024-06-20 17:01:09,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:09,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:09,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:09,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:01:09,899 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)] === [2024-06-20 17:01:09,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -298370971, now seen corresponding path program 2 times [2024-06-20 17:01:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89325342] [2024-06-20 17:01:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:09,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:11,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:11,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89325342] [2024-06-20 17:01:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89325342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:11,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:11,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310000588] [2024-06-20 17:01:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:11,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:11,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:11,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:11,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 748 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:11,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:11,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:11,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:13,094 INFO L124 PetriNetUnfolderBase]: 1262/1987 cut-off events. [2024-06-20 17:01:13,094 INFO L125 PetriNetUnfolderBase]: For 12042/12058 co-relation queries the response was YES. [2024-06-20 17:01:13,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1987 events. 1262/1987 cut-off events. For 12042/12058 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9584 event pairs, 404 based on Foata normal form. 16/1999 useless extension candidates. Maximal degree in co-relation 8641. Up to 1788 conditions per place. [2024-06-20 17:01:13,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 29 changer transitions 0/132 dead transitions. [2024-06-20 17:01:13,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1162 flow [2024-06-20 17:01:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:01:13,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:01:13,105 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 748 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:01:13,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1162 flow [2024-06-20 17:01:13,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 1111 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:01:13,117 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 812 flow [2024-06-20 17:01:13,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=812, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-20 17:01:13,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-20 17:01:13,118 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 812 flow [2024-06-20 17:01:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:13,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:13,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:13,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:01:13,118 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)] === [2024-06-20 17:01:13,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1341318835, now seen corresponding path program 3 times [2024-06-20 17:01:13,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:13,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158716842] [2024-06-20 17:01:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158716842] [2024-06-20 17:01:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158716842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:15,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:15,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869472386] [2024-06-20 17:01:15,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:15,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:15,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 812 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:15,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:15,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:15,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:16,756 INFO L124 PetriNetUnfolderBase]: 1257/1980 cut-off events. [2024-06-20 17:01:16,756 INFO L125 PetriNetUnfolderBase]: For 13597/13613 co-relation queries the response was YES. [2024-06-20 17:01:16,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8874 conditions, 1980 events. 1257/1980 cut-off events. For 13597/13613 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9558 event pairs, 404 based on Foata normal form. 16/1992 useless extension candidates. Maximal degree in co-relation 8837. Up to 1783 conditions per place. [2024-06-20 17:01:16,767 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-20 17:01:16,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1142 flow [2024-06-20 17:01:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:01:16,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:01:16,769 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 812 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:01:16,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1142 flow [2024-06-20 17:01:16,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1111 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:01:16,781 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 845 flow [2024-06-20 17:01:16,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-20 17:01:16,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-20 17:01:16,782 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 845 flow [2024-06-20 17:01:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:16,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:16,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:16,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:01:16,783 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)] === [2024-06-20 17:01:16,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1341318649, now seen corresponding path program 4 times [2024-06-20 17:01:16,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:16,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123904889] [2024-06-20 17:01:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:16,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:19,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123904889] [2024-06-20 17:01:19,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123904889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:19,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:19,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:19,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009299824] [2024-06-20 17:01:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:19,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:19,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:19,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 845 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:19,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:19,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:19,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:20,310 INFO L124 PetriNetUnfolderBase]: 1185/1894 cut-off events. [2024-06-20 17:01:20,311 INFO L125 PetriNetUnfolderBase]: For 15893/16003 co-relation queries the response was YES. [2024-06-20 17:01:20,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8801 conditions, 1894 events. 1185/1894 cut-off events. For 15893/16003 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9290 event pairs, 365 based on Foata normal form. 22/1874 useless extension candidates. Maximal degree in co-relation 8762. Up to 1592 conditions per place. [2024-06-20 17:01:20,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 45 changer transitions 0/128 dead transitions. [2024-06-20 17:01:20,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1139 flow [2024-06-20 17:01:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:01:20,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:01:20,322 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 845 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:01:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1139 flow [2024-06-20 17:01:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 1069 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:01:20,334 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 874 flow [2024-06-20 17:01:20,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-20 17:01:20,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 17:01:20,335 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 874 flow [2024-06-20 17:01:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:20,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:20,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:20,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:01:20,335 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)] === [2024-06-20 17:01:20,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1233869385, now seen corresponding path program 1 times [2024-06-20 17:01:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458296503] [2024-06-20 17:01:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:22,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458296503] [2024-06-20 17:01:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458296503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:22,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:22,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:01:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560894406] [2024-06-20 17:01:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:01:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:01:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:01:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:22,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:22,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:22,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:22,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:23,315 INFO L124 PetriNetUnfolderBase]: 1241/1951 cut-off events. [2024-06-20 17:01:23,315 INFO L125 PetriNetUnfolderBase]: For 17145/17147 co-relation queries the response was YES. [2024-06-20 17:01:23,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9085 conditions, 1951 events. 1241/1951 cut-off events. For 17145/17147 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9342 event pairs, 390 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 9045. Up to 1825 conditions per place. [2024-06-20 17:01:23,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-20 17:01:23,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1208 flow [2024-06-20 17:01:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:01:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:01:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:01:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:01:23,329 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 874 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:01:23,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1208 flow [2024-06-20 17:01:23,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1090 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:23,368 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 805 flow [2024-06-20 17:01:23,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-06-20 17:01:23,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 17:01:23,369 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 805 flow [2024-06-20 17:01:23,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:23,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:23,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:23,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:01:23,370 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)] === [2024-06-20 17:01:23,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash 524273140, now seen corresponding path program 1 times [2024-06-20 17:01:23,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:23,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623407775] [2024-06-20 17:01:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:23,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:26,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623407775] [2024-06-20 17:01:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623407775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:26,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581954651] [2024-06-20 17:01:26,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:26,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:26,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:26,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:26,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 805 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:26,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:26,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:26,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:27,481 INFO L124 PetriNetUnfolderBase]: 1254/1978 cut-off events. [2024-06-20 17:01:27,482 INFO L125 PetriNetUnfolderBase]: For 18301/18309 co-relation queries the response was YES. [2024-06-20 17:01:27,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 1978 events. 1254/1978 cut-off events. For 18301/18309 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9515 event pairs, 374 based on Foata normal form. 10/1986 useless extension candidates. Maximal degree in co-relation 9233. Up to 1776 conditions per place. [2024-06-20 17:01:27,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/158 dead transitions. [2024-06-20 17:01:27,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1332 flow [2024-06-20 17:01:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:01:27,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:01:27,496 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 805 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:01:27,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1332 flow [2024-06-20 17:01:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1301 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:01:27,512 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 987 flow [2024-06-20 17:01:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-20 17:01:27,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 17:01:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 987 flow [2024-06-20 17:01:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:01:27,514 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)] === [2024-06-20 17:01:27,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1568089404, now seen corresponding path program 2 times [2024-06-20 17:01:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259545072] [2024-06-20 17:01:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:27,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:30,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259545072] [2024-06-20 17:01:30,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259545072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:30,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670522358] [2024-06-20 17:01:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:30,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:30,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:30,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 987 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:30,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:30,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:30,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:31,789 INFO L124 PetriNetUnfolderBase]: 1285/2031 cut-off events. [2024-06-20 17:01:31,789 INFO L125 PetriNetUnfolderBase]: For 21705/21707 co-relation queries the response was YES. [2024-06-20 17:01:31,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 2031 events. 1285/2031 cut-off events. For 21705/21707 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9774 event pairs, 381 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 10022. Up to 1667 conditions per place. [2024-06-20 17:01:31,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-20 17:01:31,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1643 flow [2024-06-20 17:01:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:01:31,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:01:31,803 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 987 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:01:31,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1643 flow [2024-06-20 17:01:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1591 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:01:31,828 INFO L231 Difference]: Finished difference. Result has 106 places, 134 transitions, 1193 flow [2024-06-20 17:01:31,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2024-06-20 17:01:31,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 17:01:31,829 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1193 flow [2024-06-20 17:01:31,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:31,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:31,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:31,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:01:31,829 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)] === [2024-06-20 17:01:31,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:31,830 INFO L85 PathProgramCache]: Analyzing trace with hash -798987632, now seen corresponding path program 3 times [2024-06-20 17:01:31,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:31,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872035154] [2024-06-20 17:01:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:31,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872035154] [2024-06-20 17:01:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872035154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:34,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:34,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131253515] [2024-06-20 17:01:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:34,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:34,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1193 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:36,145 INFO L124 PetriNetUnfolderBase]: 1280/2024 cut-off events. [2024-06-20 17:01:36,145 INFO L125 PetriNetUnfolderBase]: For 24895/24897 co-relation queries the response was YES. [2024-06-20 17:01:36,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2024 events. 1280/2024 cut-off events. For 24895/24897 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9806 event pairs, 381 based on Foata normal form. 2/2021 useless extension candidates. Maximal degree in co-relation 10676. Up to 1662 conditions per place. [2024-06-20 17:01:36,159 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 48 changer transitions 0/169 dead transitions. [2024-06-20 17:01:36,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1684 flow [2024-06-20 17:01:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:01:36,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 17:01:36,163 INFO L175 Difference]: Start difference. First operand has 106 places, 134 transitions, 1193 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:01:36,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1684 flow [2024-06-20 17:01:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1640 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 17:01:36,189 INFO L231 Difference]: Finished difference. Result has 112 places, 134 transitions, 1253 flow [2024-06-20 17:01:36,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1253, PETRI_PLACES=112, PETRI_TRANSITIONS=134} [2024-06-20 17:01:36,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 17:01:36,189 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 134 transitions, 1253 flow [2024-06-20 17:01:36,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:36,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:36,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:36,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:01:36,190 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)] === [2024-06-20 17:01:36,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2072872864, now seen corresponding path program 4 times [2024-06-20 17:01:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:36,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499036652] [2024-06-20 17:01:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:36,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499036652] [2024-06-20 17:01:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499036652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846334382] [2024-06-20 17:01:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:38,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:38,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 134 transitions, 1253 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:38,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:38,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:38,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:40,015 INFO L124 PetriNetUnfolderBase]: 1293/2049 cut-off events. [2024-06-20 17:01:40,015 INFO L125 PetriNetUnfolderBase]: For 27963/27975 co-relation queries the response was YES. [2024-06-20 17:01:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11142 conditions, 2049 events. 1293/2049 cut-off events. For 27963/27975 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9906 event pairs, 385 based on Foata normal form. 6/2047 useless extension candidates. Maximal degree in co-relation 11093. Up to 1676 conditions per place. [2024-06-20 17:01:40,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-06-20 17:01:40,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 170 transitions, 1796 flow [2024-06-20 17:01:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:01:40,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:01:40,046 INFO L175 Difference]: Start difference. First operand has 112 places, 134 transitions, 1253 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:01:40,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 170 transitions, 1796 flow [2024-06-20 17:01:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 1677 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:40,070 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1338 flow [2024-06-20 17:01:40,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1338, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-20 17:01:40,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-20 17:01:40,071 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1338 flow [2024-06-20 17:01:40,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:40,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:01:40,072 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)] === [2024-06-20 17:01:40,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1047650258, now seen corresponding path program 5 times [2024-06-20 17:01:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21212230] [2024-06-20 17:01:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21212230] [2024-06-20 17:01:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21212230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:42,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:42,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805639793] [2024-06-20 17:01:42,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:42,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:42,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:42,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1338 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:42,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:42,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:42,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:44,035 INFO L124 PetriNetUnfolderBase]: 1306/2074 cut-off events. [2024-06-20 17:01:44,035 INFO L125 PetriNetUnfolderBase]: For 30790/30802 co-relation queries the response was YES. [2024-06-20 17:01:44,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11508 conditions, 2074 events. 1306/2074 cut-off events. For 30790/30802 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10091 event pairs, 385 based on Foata normal form. 6/2072 useless extension candidates. Maximal degree in co-relation 11457. Up to 1690 conditions per place. [2024-06-20 17:01:44,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 56 changer transitions 0/173 dead transitions. [2024-06-20 17:01:44,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1873 flow [2024-06-20 17:01:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:01:44,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:01:44,051 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1338 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:01:44,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1873 flow [2024-06-20 17:01:44,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1785 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:01:44,076 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1411 flow [2024-06-20 17:01:44,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-06-20 17:01:44,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 17:01:44,077 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1411 flow [2024-06-20 17:01:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:44,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:44,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:44,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:01:44,078 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)] === [2024-06-20 17:01:44,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1368787614, now seen corresponding path program 6 times [2024-06-20 17:01:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:44,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477455439] [2024-06-20 17:01:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:44,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477455439] [2024-06-20 17:01:46,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477455439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:46,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:46,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303070181] [2024-06-20 17:01:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:46,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:47,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:01:47,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1411 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:47,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:47,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:01:47,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:48,520 INFO L124 PetriNetUnfolderBase]: 1301/2067 cut-off events. [2024-06-20 17:01:48,520 INFO L125 PetriNetUnfolderBase]: For 33197/33209 co-relation queries the response was YES. [2024-06-20 17:01:48,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 2067 events. 1301/2067 cut-off events. For 33197/33209 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10052 event pairs, 385 based on Foata normal form. 6/2065 useless extension candidates. Maximal degree in co-relation 11534. Up to 1685 conditions per place. [2024-06-20 17:01:48,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-20 17:01:48,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 171 transitions, 1825 flow [2024-06-20 17:01:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:01:48,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:01:48,548 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1411 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:01:48,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 171 transitions, 1825 flow [2024-06-20 17:01:48,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 171 transitions, 1644 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 17:01:48,572 INFO L231 Difference]: Finished difference. Result has 120 places, 142 transitions, 1348 flow [2024-06-20 17:01:48,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=120, PETRI_TRANSITIONS=142} [2024-06-20 17:01:48,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-20 17:01:48,573 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 142 transitions, 1348 flow [2024-06-20 17:01:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:48,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:48,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:48,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:01:48,574 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)] === [2024-06-20 17:01:48,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash -384361836, now seen corresponding path program 1 times [2024-06-20 17:01:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913866548] [2024-06-20 17:01:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:51,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:51,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913866548] [2024-06-20 17:01:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913866548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:51,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429130329] [2024-06-20 17:01:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:51,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 142 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:51,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:51,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:52,472 INFO L124 PetriNetUnfolderBase]: 1307/2102 cut-off events. [2024-06-20 17:01:52,472 INFO L125 PetriNetUnfolderBase]: For 39727/39753 co-relation queries the response was YES. [2024-06-20 17:01:52,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2102 events. 1307/2102 cut-off events. For 39727/39753 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10598 event pairs, 212 based on Foata normal form. 20/2077 useless extension candidates. Maximal degree in co-relation 11975. Up to 1677 conditions per place. [2024-06-20 17:01:52,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2024-06-20 17:01:52,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 1944 flow [2024-06-20 17:01:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:01:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:01:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:01:52,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 17:01:52,487 INFO L175 Difference]: Start difference. First operand has 120 places, 142 transitions, 1348 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:01:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 1944 flow [2024-06-20 17:01:52,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 1821 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:01:52,515 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1384 flow [2024-06-20 17:01:52,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1384, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-20 17:01:52,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-20 17:01:52,515 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1384 flow [2024-06-20 17:01:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:52,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:52,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:52,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:01:52,516 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)] === [2024-06-20 17:01:52,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -927405126, now seen corresponding path program 2 times [2024-06-20 17:01:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47344575] [2024-06-20 17:01:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:55,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:55,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47344575] [2024-06-20 17:01:55,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47344575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:55,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:55,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:55,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126551563] [2024-06-20 17:01:55,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:55,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:55,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:55,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:55,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:55,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1384 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:55,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:55,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:55,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:01:56,464 INFO L124 PetriNetUnfolderBase]: 1295/2084 cut-off events. [2024-06-20 17:01:56,464 INFO L125 PetriNetUnfolderBase]: For 42359/42392 co-relation queries the response was YES. [2024-06-20 17:01:56,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12067 conditions, 2084 events. 1295/2084 cut-off events. For 42359/42392 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10535 event pairs, 297 based on Foata normal form. 18/2058 useless extension candidates. Maximal degree in co-relation 12014. Up to 1758 conditions per place. [2024-06-20 17:01:56,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 44 changer transitions 0/184 dead transitions. [2024-06-20 17:01:56,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1812 flow [2024-06-20 17:01:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:01:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:01:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:01:56,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:01:56,477 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1384 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:01:56,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1812 flow [2024-06-20 17:01:56,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1715 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:01:56,502 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1385 flow [2024-06-20 17:01:56,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-20 17:01:56,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-20 17:01:56,503 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1385 flow [2024-06-20 17:01:56,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:56,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:01:56,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:01:56,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:01:56,503 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)] === [2024-06-20 17:01:56,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:01:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash -812113956, now seen corresponding path program 3 times [2024-06-20 17:01:56,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:01:56,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823010942] [2024-06-20 17:01:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:01:56,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:01:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:01:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:01:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:01:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823010942] [2024-06-20 17:01:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823010942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:01:59,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:01:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:01:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217949436] [2024-06-20 17:01:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:01:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:01:59,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:01:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:01:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:01:59,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:01:59,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1385 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:01:59,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:01:59,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:01:59,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:00,742 INFO L124 PetriNetUnfolderBase]: 1319/2121 cut-off events. [2024-06-20 17:02:00,743 INFO L125 PetriNetUnfolderBase]: For 46322/46341 co-relation queries the response was YES. [2024-06-20 17:02:00,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12400 conditions, 2121 events. 1319/2121 cut-off events. For 46322/46341 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10773 event pairs, 308 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 12345. Up to 1729 conditions per place. [2024-06-20 17:02:00,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/181 dead transitions. [2024-06-20 17:02:00,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 1817 flow [2024-06-20 17:02:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:02:00,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:02:00,759 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1385 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:02:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 1817 flow [2024-06-20 17:02:00,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1719 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:02:00,793 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1451 flow [2024-06-20 17:02:00,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1451, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-20 17:02:00,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 17:02:00,793 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1451 flow [2024-06-20 17:02:00,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:00,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:00,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:00,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:02:00,794 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)] === [2024-06-20 17:02:00,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash -811929258, now seen corresponding path program 1 times [2024-06-20 17:02:00,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729842831] [2024-06-20 17:02:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:00,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:03,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729842831] [2024-06-20 17:02:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729842831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:03,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:03,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432270507] [2024-06-20 17:02:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:03,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:03,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1451 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:04,917 INFO L124 PetriNetUnfolderBase]: 1405/2234 cut-off events. [2024-06-20 17:02:04,918 INFO L125 PetriNetUnfolderBase]: For 46544/46556 co-relation queries the response was YES. [2024-06-20 17:02:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12939 conditions, 2234 events. 1405/2234 cut-off events. For 46544/46556 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11125 event pairs, 346 based on Foata normal form. 16/2245 useless extension candidates. Maximal degree in co-relation 12883. Up to 1990 conditions per place. [2024-06-20 17:02:04,932 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-06-20 17:02:04,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1929 flow [2024-06-20 17:02:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:02:04,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:02:04,933 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1451 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:02:04,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1929 flow [2024-06-20 17:02:04,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1785 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:04,975 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1392 flow [2024-06-20 17:02:04,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-20 17:02:04,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-20 17:02:04,976 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1392 flow [2024-06-20 17:02:04,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:04,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:04,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:02:04,977 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)] === [2024-06-20 17:02:04,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1323626346, now seen corresponding path program 4 times [2024-06-20 17:02:04,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:04,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256054926] [2024-06-20 17:02:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:04,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:07,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:07,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256054926] [2024-06-20 17:02:07,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256054926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:07,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:07,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351247767] [2024-06-20 17:02:07,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:07,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:07,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:07,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:07,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:02:07,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:07,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:07,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:02:07,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:08,922 INFO L124 PetriNetUnfolderBase]: 1330/2137 cut-off events. [2024-06-20 17:02:08,923 INFO L125 PetriNetUnfolderBase]: For 51850/51883 co-relation queries the response was YES. [2024-06-20 17:02:08,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12712 conditions, 2137 events. 1330/2137 cut-off events. For 51850/51883 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10773 event pairs, 312 based on Foata normal form. 10/2092 useless extension candidates. Maximal degree in co-relation 12655. Up to 1745 conditions per place. [2024-06-20 17:02:08,939 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-20 17:02:08,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 1820 flow [2024-06-20 17:02:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:02:08,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:02:08,942 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1392 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:02:08,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 1820 flow [2024-06-20 17:02:08,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1753 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:08,980 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1493 flow [2024-06-20 17:02:08,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-20 17:02:08,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 17:02:08,981 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1493 flow [2024-06-20 17:02:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:08,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:08,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:08,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:02:08,981 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:08,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash 517265362, now seen corresponding path program 2 times [2024-06-20 17:02:08,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:08,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386786596] [2024-06-20 17:02:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386786596] [2024-06-20 17:02:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386786596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:11,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298432716] [2024-06-20 17:02:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:11,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:11,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1493 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:11,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:11,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:11,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:13,127 INFO L124 PetriNetUnfolderBase]: 1412/2250 cut-off events. [2024-06-20 17:02:13,127 INFO L125 PetriNetUnfolderBase]: For 51689/51711 co-relation queries the response was YES. [2024-06-20 17:02:13,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13238 conditions, 2250 events. 1412/2250 cut-off events. For 51689/51711 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11222 event pairs, 340 based on Foata normal form. 24/2270 useless extension candidates. Maximal degree in co-relation 13180. Up to 2003 conditions per place. [2024-06-20 17:02:13,140 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2024-06-20 17:02:13,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1969 flow [2024-06-20 17:02:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:02:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:02:13,142 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1493 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:02:13,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1969 flow [2024-06-20 17:02:13,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 1821 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:13,175 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1434 flow [2024-06-20 17:02:13,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-20 17:02:13,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-20 17:02:13,176 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1434 flow [2024-06-20 17:02:13,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:13,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:13,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:02:13,177 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)] === [2024-06-20 17:02:13,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 745166512, now seen corresponding path program 3 times [2024-06-20 17:02:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:13,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775756840] [2024-06-20 17:02:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775756840] [2024-06-20 17:02:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775756840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089835712] [2024-06-20 17:02:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:15,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:15,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:15,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:15,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:15,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:17,124 INFO L124 PetriNetUnfolderBase]: 1432/2282 cut-off events. [2024-06-20 17:02:17,125 INFO L125 PetriNetUnfolderBase]: For 54702/54724 co-relation queries the response was YES. [2024-06-20 17:02:17,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13453 conditions, 2282 events. 1432/2282 cut-off events. For 54702/54724 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11416 event pairs, 346 based on Foata normal form. 24/2302 useless extension candidates. Maximal degree in co-relation 13394. Up to 2035 conditions per place. [2024-06-20 17:02:17,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 31 changer transitions 0/188 dead transitions. [2024-06-20 17:02:17,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 1918 flow [2024-06-20 17:02:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:02:17,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:02:17,143 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1434 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:02:17,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 1918 flow [2024-06-20 17:02:17,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1847 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:17,175 INFO L231 Difference]: Finished difference. Result has 135 places, 156 transitions, 1458 flow [2024-06-20 17:02:17,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1458, PETRI_PLACES=135, PETRI_TRANSITIONS=156} [2024-06-20 17:02:17,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 17:02:17,180 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 156 transitions, 1458 flow [2024-06-20 17:02:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:02:17,181 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)] === [2024-06-20 17:02:17,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -337460490, now seen corresponding path program 4 times [2024-06-20 17:02:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114455623] [2024-06-20 17:02:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:19,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114455623] [2024-06-20 17:02:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114455623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:19,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:02:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875658838] [2024-06-20 17:02:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:02:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:02:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:02:19,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:19,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 156 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:19,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:19,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:20,750 INFO L124 PetriNetUnfolderBase]: 1424/2270 cut-off events. [2024-06-20 17:02:20,751 INFO L125 PetriNetUnfolderBase]: For 57036/57058 co-relation queries the response was YES. [2024-06-20 17:02:20,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13536 conditions, 2270 events. 1424/2270 cut-off events. For 57036/57058 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11403 event pairs, 308 based on Foata normal form. 24/2290 useless extension candidates. Maximal degree in co-relation 13476. Up to 1929 conditions per place. [2024-06-20 17:02:20,766 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-20 17:02:20,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 1954 flow [2024-06-20 17:02:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:02:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:02:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:02:20,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:02:20,768 INFO L175 Difference]: Start difference. First operand has 135 places, 156 transitions, 1458 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:02:20,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 1954 flow [2024-06-20 17:02:20,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 1877 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:20,816 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1494 flow [2024-06-20 17:02:20,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1494, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-20 17:02:20,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 17:02:20,819 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1494 flow [2024-06-20 17:02:20,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:20,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:20,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:20,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:02:20,820 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:02:20,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1354689440, now seen corresponding path program 1 times [2024-06-20 17:02:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:20,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094710515] [2024-06-20 17:02:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094710515] [2024-06-20 17:02:22,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094710515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:22,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:22,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:02:22,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028420888] [2024-06-20 17:02:22,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:22,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:02:22,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:22,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:02:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:02:22,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:02:22,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1494 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:22,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:22,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:02:22,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:23,280 INFO L124 PetriNetUnfolderBase]: 1320/2151 cut-off events. [2024-06-20 17:02:23,280 INFO L125 PetriNetUnfolderBase]: For 58114/58148 co-relation queries the response was YES. [2024-06-20 17:02:23,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13031 conditions, 2151 events. 1320/2151 cut-off events. For 58114/58148 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11112 event pairs, 343 based on Foata normal form. 34/2181 useless extension candidates. Maximal degree in co-relation 12970. Up to 1925 conditions per place. [2024-06-20 17:02:23,295 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2024-06-20 17:02:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1846 flow [2024-06-20 17:02:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:02:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:02:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:02:23,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:02:23,296 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1494 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:02:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1846 flow [2024-06-20 17:02:23,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 172 transitions, 1751 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:02:23,339 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1451 flow [2024-06-20 17:02:23,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1451, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-20 17:02:23,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-20 17:02:23,339 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1451 flow [2024-06-20 17:02:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:23,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:23,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:02:23,340 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)] === [2024-06-20 17:02:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash 451951617, now seen corresponding path program 1 times [2024-06-20 17:02:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:23,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206574740] [2024-06-20 17:02:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:26,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206574740] [2024-06-20 17:02:26,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206574740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:26,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:26,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681805434] [2024-06-20 17:02:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:26,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:26,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:26,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:26,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:26,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:26,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:27,923 INFO L124 PetriNetUnfolderBase]: 1562/2516 cut-off events. [2024-06-20 17:02:27,923 INFO L125 PetriNetUnfolderBase]: For 73100/73112 co-relation queries the response was YES. [2024-06-20 17:02:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15220 conditions, 2516 events. 1562/2516 cut-off events. For 73100/73112 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13176 event pairs, 255 based on Foata normal form. 24/2538 useless extension candidates. Maximal degree in co-relation 15158. Up to 1924 conditions per place. [2024-06-20 17:02:27,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-20 17:02:27,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 2251 flow [2024-06-20 17:02:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:02:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:02:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 17:02:27,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:02:27,946 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1451 flow. Second operand 10 states and 185 transitions. [2024-06-20 17:02:27,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 2251 flow [2024-06-20 17:02:28,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2221 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 17:02:28,007 INFO L231 Difference]: Finished difference. Result has 145 places, 166 transitions, 1560 flow [2024-06-20 17:02:28,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1560, PETRI_PLACES=145, PETRI_TRANSITIONS=166} [2024-06-20 17:02:28,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-20 17:02:28,007 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 166 transitions, 1560 flow [2024-06-20 17:02:28,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:28,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:28,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:28,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:02:28,008 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)] === [2024-06-20 17:02:28,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1315213813, now seen corresponding path program 2 times [2024-06-20 17:02:28,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:28,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341613384] [2024-06-20 17:02:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:28,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341613384] [2024-06-20 17:02:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341613384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:31,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:31,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:31,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966456303] [2024-06-20 17:02:31,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:31,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:31,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:31,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 166 transitions, 1560 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:31,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:31,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:32,631 INFO L124 PetriNetUnfolderBase]: 1610/2600 cut-off events. [2024-06-20 17:02:32,632 INFO L125 PetriNetUnfolderBase]: For 78311/78323 co-relation queries the response was YES. [2024-06-20 17:02:32,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15968 conditions, 2600 events. 1610/2600 cut-off events. For 78311/78323 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13725 event pairs, 354 based on Foata normal form. 24/2622 useless extension candidates. Maximal degree in co-relation 15903. Up to 2102 conditions per place. [2024-06-20 17:02:32,651 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 26 changer transitions 0/220 dead transitions. [2024-06-20 17:02:32,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 220 transitions, 2319 flow [2024-06-20 17:02:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:02:32,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:02:32,653 INFO L175 Difference]: Start difference. First operand has 145 places, 166 transitions, 1560 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:02:32,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 220 transitions, 2319 flow [2024-06-20 17:02:32,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 220 transitions, 2265 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:32,713 INFO L231 Difference]: Finished difference. Result has 150 places, 169 transitions, 1617 flow [2024-06-20 17:02:32,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1617, PETRI_PLACES=150, PETRI_TRANSITIONS=169} [2024-06-20 17:02:32,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 17:02:32,714 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 169 transitions, 1617 flow [2024-06-20 17:02:32,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:32,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:32,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:32,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:02:32,715 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)] === [2024-06-20 17:02:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1315217533, now seen corresponding path program 3 times [2024-06-20 17:02:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947881909] [2024-06-20 17:02:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:36,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947881909] [2024-06-20 17:02:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947881909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:36,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:36,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274773974] [2024-06-20 17:02:36,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:36,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:36,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 169 transitions, 1617 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:36,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:36,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:36,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:37,481 INFO L124 PetriNetUnfolderBase]: 1582/2556 cut-off events. [2024-06-20 17:02:37,481 INFO L125 PetriNetUnfolderBase]: For 78353/78365 co-relation queries the response was YES. [2024-06-20 17:02:37,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15526 conditions, 2556 events. 1582/2556 cut-off events. For 78353/78365 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13470 event pairs, 358 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 15458. Up to 2206 conditions per place. [2024-06-20 17:02:37,500 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 26 changer transitions 0/216 dead transitions. [2024-06-20 17:02:37,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2211 flow [2024-06-20 17:02:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:02:37,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:02:37,502 INFO L175 Difference]: Start difference. First operand has 150 places, 169 transitions, 1617 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:02:37,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2211 flow [2024-06-20 17:02:37,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2141 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:37,584 INFO L231 Difference]: Finished difference. Result has 154 places, 170 transitions, 1630 flow [2024-06-20 17:02:37,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1630, PETRI_PLACES=154, PETRI_TRANSITIONS=170} [2024-06-20 17:02:37,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 17:02:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 170 transitions, 1630 flow [2024-06-20 17:02:37,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:37,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:37,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:02:37,585 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)] === [2024-06-20 17:02:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 599783037, now seen corresponding path program 4 times [2024-06-20 17:02:37,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:37,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693542242] [2024-06-20 17:02:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:41,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693542242] [2024-06-20 17:02:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693542242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:41,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:41,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272370664] [2024-06-20 17:02:41,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:41,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:41,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 170 transitions, 1630 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:41,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:41,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:41,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:42,511 INFO L124 PetriNetUnfolderBase]: 1650/2680 cut-off events. [2024-06-20 17:02:42,512 INFO L125 PetriNetUnfolderBase]: For 82607/82609 co-relation queries the response was YES. [2024-06-20 17:02:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16111 conditions, 2680 events. 1650/2680 cut-off events. For 82607/82609 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14417 event pairs, 394 based on Foata normal form. 16/2691 useless extension candidates. Maximal degree in co-relation 16041. Up to 2162 conditions per place. [2024-06-20 17:02:42,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-20 17:02:42,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 212 transitions, 2192 flow [2024-06-20 17:02:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:02:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:02:42,534 INFO L175 Difference]: Start difference. First operand has 154 places, 170 transitions, 1630 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:02:42,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 212 transitions, 2192 flow [2024-06-20 17:02:42,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 212 transitions, 2143 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:02:42,606 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1724 flow [2024-06-20 17:02:42,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-06-20 17:02:42,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 17:02:42,606 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1724 flow [2024-06-20 17:02:42,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:42,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:42,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:42,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:02:42,607 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)] === [2024-06-20 17:02:42,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 594276507, now seen corresponding path program 5 times [2024-06-20 17:02:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179099599] [2024-06-20 17:02:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179099599] [2024-06-20 17:02:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179099599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:45,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:45,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666085590] [2024-06-20 17:02:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:45,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1724 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:45,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:45,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:47,167 INFO L124 PetriNetUnfolderBase]: 1718/2808 cut-off events. [2024-06-20 17:02:47,167 INFO L125 PetriNetUnfolderBase]: For 88972/88974 co-relation queries the response was YES. [2024-06-20 17:02:47,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16951 conditions, 2808 events. 1718/2808 cut-off events. For 88972/88974 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15471 event pairs, 412 based on Foata normal form. 16/2819 useless extension candidates. Maximal degree in co-relation 16880. Up to 2278 conditions per place. [2024-06-20 17:02:47,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-20 17:02:47,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 213 transitions, 2290 flow [2024-06-20 17:02:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:02:47,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:02:47,196 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1724 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:02:47,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 213 transitions, 2290 flow [2024-06-20 17:02:47,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2165 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:02:47,273 INFO L231 Difference]: Finished difference. Result has 158 places, 172 transitions, 1740 flow [2024-06-20 17:02:47,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1740, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2024-06-20 17:02:47,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-20 17:02:47,277 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 1740 flow [2024-06-20 17:02:47,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:47,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:47,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:47,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:02:47,277 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)] === [2024-06-20 17:02:47,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash 971931537, now seen corresponding path program 6 times [2024-06-20 17:02:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:47,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076824439] [2024-06-20 17:02:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:50,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:50,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076824439] [2024-06-20 17:02:50,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076824439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:50,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:50,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977156015] [2024-06-20 17:02:50,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:50,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:50,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:50,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:50,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 1740 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:50,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:50,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:50,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:51,951 INFO L124 PetriNetUnfolderBase]: 1766/2892 cut-off events. [2024-06-20 17:02:51,951 INFO L125 PetriNetUnfolderBase]: For 91783/91785 co-relation queries the response was YES. [2024-06-20 17:02:51,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17387 conditions, 2892 events. 1766/2892 cut-off events. For 91783/91785 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16047 event pairs, 404 based on Foata normal form. 12/2899 useless extension candidates. Maximal degree in co-relation 17315. Up to 2144 conditions per place. [2024-06-20 17:02:51,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 59 changer transitions 0/219 dead transitions. [2024-06-20 17:02:51,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 2360 flow [2024-06-20 17:02:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:02:51,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:02:51,980 INFO L175 Difference]: Start difference. First operand has 158 places, 172 transitions, 1740 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:02:51,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 2360 flow [2024-06-20 17:02:52,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 219 transitions, 2237 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:02:52,069 INFO L231 Difference]: Finished difference. Result has 161 places, 175 transitions, 1802 flow [2024-06-20 17:02:52,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1802, PETRI_PLACES=161, PETRI_TRANSITIONS=175} [2024-06-20 17:02:52,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 17:02:52,070 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 175 transitions, 1802 flow [2024-06-20 17:02:52,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:52,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:52,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:02:52,071 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)] === [2024-06-20 17:02:52,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 977656989, now seen corresponding path program 1 times [2024-06-20 17:02:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736345343] [2024-06-20 17:02:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736345343] [2024-06-20 17:02:54,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736345343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:54,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:54,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:54,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372030573] [2024-06-20 17:02:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:55,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:55,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 175 transitions, 1802 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:55,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:55,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:55,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:02:56,268 INFO L124 PetriNetUnfolderBase]: 1814/2976 cut-off events. [2024-06-20 17:02:56,268 INFO L125 PetriNetUnfolderBase]: For 97373/97375 co-relation queries the response was YES. [2024-06-20 17:02:56,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17926 conditions, 2976 events. 1814/2976 cut-off events. For 97373/97375 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16639 event pairs, 414 based on Foata normal form. 12/2983 useless extension candidates. Maximal degree in co-relation 17852. Up to 2116 conditions per place. [2024-06-20 17:02:56,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 62 changer transitions 0/220 dead transitions. [2024-06-20 17:02:56,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2402 flow [2024-06-20 17:02:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:02:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:02:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:02:56,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:02:56,296 INFO L175 Difference]: Start difference. First operand has 161 places, 175 transitions, 1802 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:02:56,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2402 flow [2024-06-20 17:02:56,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 220 transitions, 2309 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:02:56,422 INFO L231 Difference]: Finished difference. Result has 165 places, 176 transitions, 1865 flow [2024-06-20 17:02:56,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1865, PETRI_PLACES=165, PETRI_TRANSITIONS=176} [2024-06-20 17:02:56,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 17:02:56,423 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 176 transitions, 1865 flow [2024-06-20 17:02:56,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:56,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:02:56,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:02:56,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:02:56,424 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)] === [2024-06-20 17:02:56,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:02:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash 691043677, now seen corresponding path program 7 times [2024-06-20 17:02:56,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:02:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711179068] [2024-06-20 17:02:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:02:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:02:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:02:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:02:59,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:02:59,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711179068] [2024-06-20 17:02:59,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711179068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:02:59,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:02:59,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:02:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769333494] [2024-06-20 17:02:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:02:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:02:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:02:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:02:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:02:59,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:02:59,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 176 transitions, 1865 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:02:59,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:02:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:02:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:00,926 INFO L124 PetriNetUnfolderBase]: 1882/3104 cut-off events. [2024-06-20 17:03:00,927 INFO L125 PetriNetUnfolderBase]: For 105848/105860 co-relation queries the response was YES. [2024-06-20 17:03:00,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18825 conditions, 3104 events. 1882/3104 cut-off events. For 105848/105860 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17764 event pairs, 458 based on Foata normal form. 20/3116 useless extension candidates. Maximal degree in co-relation 18749. Up to 2562 conditions per place. [2024-06-20 17:03:00,952 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 154 selfloop transitions, 56 changer transitions 0/215 dead transitions. [2024-06-20 17:03:00,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 215 transitions, 2433 flow [2024-06-20 17:03:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:03:00,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:03:00,954 INFO L175 Difference]: Start difference. First operand has 165 places, 176 transitions, 1865 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:03:00,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 215 transitions, 2433 flow [2024-06-20 17:03:01,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 215 transitions, 2291 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:01,061 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 1870 flow [2024-06-20 17:03:01,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1870, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-06-20 17:03:01,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 17:03:01,061 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 1870 flow [2024-06-20 17:03:01,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:01,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:01,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:03:01,062 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:01,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash -617759207, now seen corresponding path program 8 times [2024-06-20 17:03:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509725681] [2024-06-20 17:03:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509725681] [2024-06-20 17:03:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509725681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050371925] [2024-06-20 17:03:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:04,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:04,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:04,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 1870 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:05,865 INFO L124 PetriNetUnfolderBase]: 1950/3232 cut-off events. [2024-06-20 17:03:05,865 INFO L125 PetriNetUnfolderBase]: For 112382/112394 co-relation queries the response was YES. [2024-06-20 17:03:05,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19405 conditions, 3232 events. 1950/3232 cut-off events. For 112382/112394 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18753 event pairs, 476 based on Foata normal form. 20/3244 useless extension candidates. Maximal degree in co-relation 19328. Up to 2678 conditions per place. [2024-06-20 17:03:05,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 154 selfloop transitions, 57 changer transitions 0/216 dead transitions. [2024-06-20 17:03:05,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2442 flow [2024-06-20 17:03:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:03:05,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:03:05,890 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 1870 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:03:05,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2442 flow [2024-06-20 17:03:05,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 216 transitions, 2313 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:05,992 INFO L231 Difference]: Finished difference. Result has 169 places, 178 transitions, 1892 flow [2024-06-20 17:03:05,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1892, PETRI_PLACES=169, PETRI_TRANSITIONS=178} [2024-06-20 17:03:05,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-20 17:03:05,994 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 178 transitions, 1892 flow [2024-06-20 17:03:05,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:05,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:05,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:03:05,995 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:05,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash -617762927, now seen corresponding path program 9 times [2024-06-20 17:03:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:05,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109049658] [2024-06-20 17:03:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109049658] [2024-06-20 17:03:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109049658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:09,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:09,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403091903] [2024-06-20 17:03:09,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:09,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:09,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:09,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:09,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 178 transitions, 1892 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:10,643 INFO L124 PetriNetUnfolderBase]: 2066/3432 cut-off events. [2024-06-20 17:03:10,643 INFO L125 PetriNetUnfolderBase]: For 124548/124560 co-relation queries the response was YES. [2024-06-20 17:03:10,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20871 conditions, 3432 events. 2066/3432 cut-off events. For 124548/124560 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20289 event pairs, 494 based on Foata normal form. 16/3440 useless extension candidates. Maximal degree in co-relation 20793. Up to 2512 conditions per place. [2024-06-20 17:03:10,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 159 selfloop transitions, 60 changer transitions 0/224 dead transitions. [2024-06-20 17:03:10,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 224 transitions, 2684 flow [2024-06-20 17:03:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:03:10,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:03:10,672 INFO L175 Difference]: Start difference. First operand has 169 places, 178 transitions, 1892 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:03:10,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 224 transitions, 2684 flow [2024-06-20 17:03:10,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 224 transitions, 2551 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:10,820 INFO L231 Difference]: Finished difference. Result has 172 places, 181 transitions, 1964 flow [2024-06-20 17:03:10,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1964, PETRI_PLACES=172, PETRI_TRANSITIONS=181} [2024-06-20 17:03:10,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 17:03:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 181 transitions, 1964 flow [2024-06-20 17:03:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:10,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:10,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:03:10,821 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2137251619, now seen corresponding path program 10 times [2024-06-20 17:03:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904096180] [2024-06-20 17:03:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:13,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904096180] [2024-06-20 17:03:13,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904096180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:13,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:13,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31896664] [2024-06-20 17:03:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:13,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:13,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 181 transitions, 1964 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:13,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:13,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:13,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:15,513 INFO L124 PetriNetUnfolderBase]: 2038/3388 cut-off events. [2024-06-20 17:03:15,513 INFO L125 PetriNetUnfolderBase]: For 120985/120997 co-relation queries the response was YES. [2024-06-20 17:03:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20150 conditions, 3388 events. 2038/3388 cut-off events. For 120985/120997 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19973 event pairs, 498 based on Foata normal form. 20/3400 useless extension candidates. Maximal degree in co-relation 20070. Up to 2834 conditions per place. [2024-06-20 17:03:15,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 60 changer transitions 0/220 dead transitions. [2024-06-20 17:03:15,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 220 transitions, 2549 flow [2024-06-20 17:03:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:03:15,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:03:15,543 INFO L175 Difference]: Start difference. First operand has 172 places, 181 transitions, 1964 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:03:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 220 transitions, 2549 flow [2024-06-20 17:03:15,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 220 transitions, 2418 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 17:03:15,704 INFO L231 Difference]: Finished difference. Result has 176 places, 182 transitions, 1995 flow [2024-06-20 17:03:15,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1995, PETRI_PLACES=176, PETRI_TRANSITIONS=182} [2024-06-20 17:03:15,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 17:03:15,705 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 182 transitions, 1995 flow [2024-06-20 17:03:15,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:15,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:15,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:03:15,705 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:15,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1439844097, now seen corresponding path program 2 times [2024-06-20 17:03:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475353615] [2024-06-20 17:03:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475353615] [2024-06-20 17:03:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475353615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:18,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:18,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317780120] [2024-06-20 17:03:18,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:18,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:18,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:18,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:18,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 182 transitions, 1995 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:18,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:18,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:18,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:20,187 INFO L124 PetriNetUnfolderBase]: 2086/3484 cut-off events. [2024-06-20 17:03:20,187 INFO L125 PetriNetUnfolderBase]: For 121797/121809 co-relation queries the response was YES. [2024-06-20 17:03:20,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20623 conditions, 3484 events. 2086/3484 cut-off events. For 121797/121809 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20824 event pairs, 498 based on Foata normal form. 16/3492 useless extension candidates. Maximal degree in co-relation 20541. Up to 2700 conditions per place. [2024-06-20 17:03:20,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-20 17:03:20,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 224 transitions, 2603 flow [2024-06-20 17:03:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:03:20,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:03:20,224 INFO L175 Difference]: Start difference. First operand has 176 places, 182 transitions, 1995 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:03:20,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 224 transitions, 2603 flow [2024-06-20 17:03:20,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2482 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:20,365 INFO L231 Difference]: Finished difference. Result has 178 places, 183 transitions, 2032 flow [2024-06-20 17:03:20,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=178, PETRI_TRANSITIONS=183} [2024-06-20 17:03:20,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 17:03:20,366 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 183 transitions, 2032 flow [2024-06-20 17:03:20,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:20,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:20,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:03:20,367 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:20,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1633783507, now seen corresponding path program 3 times [2024-06-20 17:03:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931442891] [2024-06-20 17:03:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:23,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931442891] [2024-06-20 17:03:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931442891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:23,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:23,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075954886] [2024-06-20 17:03:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:23,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:23,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:23,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 183 transitions, 2032 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:23,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:23,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:23,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:24,768 INFO L124 PetriNetUnfolderBase]: 2134/3580 cut-off events. [2024-06-20 17:03:24,768 INFO L125 PetriNetUnfolderBase]: For 129252/129264 co-relation queries the response was YES. [2024-06-20 17:03:24,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21223 conditions, 3580 events. 2134/3580 cut-off events. For 129252/129264 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21571 event pairs, 516 based on Foata normal form. 16/3588 useless extension candidates. Maximal degree in co-relation 21140. Up to 2896 conditions per place. [2024-06-20 17:03:24,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 62 changer transitions 0/225 dead transitions. [2024-06-20 17:03:24,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 225 transitions, 2644 flow [2024-06-20 17:03:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:03:24,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:03:24,810 INFO L175 Difference]: Start difference. First operand has 178 places, 183 transitions, 2032 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:03:24,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 225 transitions, 2644 flow [2024-06-20 17:03:24,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 225 transitions, 2500 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:25,023 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2054 flow [2024-06-20 17:03:25,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2054, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2024-06-20 17:03:25,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 17:03:25,024 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2054 flow [2024-06-20 17:03:25,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:25,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:25,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:25,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:03:25,024 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:03:25,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1871339137, now seen corresponding path program 4 times [2024-06-20 17:03:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:25,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58420912] [2024-06-20 17:03:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:28,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:28,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58420912] [2024-06-20 17:03:28,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58420912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:28,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:28,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:03:28,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212682067] [2024-06-20 17:03:28,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:03:28,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:03:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:03:28,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:28,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2054 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:28,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:28,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:29,765 INFO L124 PetriNetUnfolderBase]: 2114/3548 cut-off events. [2024-06-20 17:03:29,766 INFO L125 PetriNetUnfolderBase]: For 123662/123674 co-relation queries the response was YES. [2024-06-20 17:03:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20547 conditions, 3548 events. 2114/3548 cut-off events. For 123662/123674 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21330 event pairs, 451 based on Foata normal form. 16/3556 useless extension candidates. Maximal degree in co-relation 20463. Up to 1958 conditions per place. [2024-06-20 17:03:29,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 74 changer transitions 0/225 dead transitions. [2024-06-20 17:03:29,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 225 transitions, 2550 flow [2024-06-20 17:03:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:03:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:03:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:03:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:03:29,860 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2054 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:03:29,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 225 transitions, 2550 flow [2024-06-20 17:03:30,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 225 transitions, 2398 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:03:30,006 INFO L231 Difference]: Finished difference. Result has 181 places, 183 transitions, 1970 flow [2024-06-20 17:03:30,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1970, PETRI_PLACES=181, PETRI_TRANSITIONS=183} [2024-06-20 17:03:30,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 17:03:30,007 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 183 transitions, 1970 flow [2024-06-20 17:03:30,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:30,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:30,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:30,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:03:30,007 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)] === [2024-06-20 17:03:30,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1674532397, now seen corresponding path program 1 times [2024-06-20 17:03:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:30,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234113319] [2024-06-20 17:03:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:32,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:32,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234113319] [2024-06-20 17:03:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234113319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:32,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:32,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:32,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691894090] [2024-06-20 17:03:32,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:32,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:32,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:03:32,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 183 transitions, 1970 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:32,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:32,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:03:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:33,842 INFO L124 PetriNetUnfolderBase]: 2020/3437 cut-off events. [2024-06-20 17:03:33,843 INFO L125 PetriNetUnfolderBase]: For 123927/123961 co-relation queries the response was YES. [2024-06-20 17:03:33,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20342 conditions, 3437 events. 2020/3437 cut-off events. For 123927/123961 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21175 event pairs, 481 based on Foata normal form. 36/3442 useless extension candidates. Maximal degree in co-relation 20257. Up to 3047 conditions per place. [2024-06-20 17:03:33,870 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 41 changer transitions 0/217 dead transitions. [2024-06-20 17:03:33,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 217 transitions, 2609 flow [2024-06-20 17:03:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:03:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:03:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:03:33,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:03:33,872 INFO L175 Difference]: Start difference. First operand has 181 places, 183 transitions, 1970 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:03:33,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 217 transitions, 2609 flow [2024-06-20 17:03:33,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 217 transitions, 2333 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 17:03:33,966 INFO L231 Difference]: Finished difference. Result has 179 places, 194 transitions, 1893 flow [2024-06-20 17:03:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1893, PETRI_PLACES=179, PETRI_TRANSITIONS=194} [2024-06-20 17:03:33,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 17:03:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 194 transitions, 1893 flow [2024-06-20 17:03:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:33,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:33,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:33,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:03:33,968 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)] === [2024-06-20 17:03:33,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -298839521, now seen corresponding path program 2 times [2024-06-20 17:03:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730126792] [2024-06-20 17:03:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:36,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730126792] [2024-06-20 17:03:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730126792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:36,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:36,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687892786] [2024-06-20 17:03:36,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:36,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:36,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:36,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:03:36,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 194 transitions, 1893 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:36,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:36,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:03:36,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:37,634 INFO L124 PetriNetUnfolderBase]: 2007/3408 cut-off events. [2024-06-20 17:03:37,634 INFO L125 PetriNetUnfolderBase]: For 123590/123601 co-relation queries the response was YES. [2024-06-20 17:03:37,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19510 conditions, 3408 events. 2007/3408 cut-off events. For 123590/123601 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20896 event pairs, 482 based on Foata normal form. 13/3382 useless extension candidates. Maximal degree in co-relation 19427. Up to 3039 conditions per place. [2024-06-20 17:03:37,663 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 153 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-20 17:03:37,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 213 transitions, 2329 flow [2024-06-20 17:03:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 17:03:37,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:03:37,664 INFO L175 Difference]: Start difference. First operand has 179 places, 194 transitions, 1893 flow. Second operand 6 states and 111 transitions. [2024-06-20 17:03:37,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 213 transitions, 2329 flow [2024-06-20 17:03:37,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 213 transitions, 2269 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:37,821 INFO L231 Difference]: Finished difference. Result has 183 places, 194 transitions, 1926 flow [2024-06-20 17:03:37,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1926, PETRI_PLACES=183, PETRI_TRANSITIONS=194} [2024-06-20 17:03:37,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 17:03:37,822 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 194 transitions, 1926 flow [2024-06-20 17:03:37,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:37,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:37,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:03:37,822 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)] === [2024-06-20 17:03:37,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -298423811, now seen corresponding path program 3 times [2024-06-20 17:03:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:37,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414111864] [2024-06-20 17:03:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:37,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:40,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:40,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414111864] [2024-06-20 17:03:40,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414111864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:40,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:40,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224995505] [2024-06-20 17:03:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:40,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:40,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:03:40,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 194 transitions, 1926 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:40,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:40,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:03:40,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:41,341 INFO L124 PetriNetUnfolderBase]: 1996/3384 cut-off events. [2024-06-20 17:03:41,341 INFO L125 PetriNetUnfolderBase]: For 125265/125287 co-relation queries the response was YES. [2024-06-20 17:03:41,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19388 conditions, 3384 events. 1996/3384 cut-off events. For 125265/125287 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20739 event pairs, 486 based on Foata normal form. 25/3362 useless extension candidates. Maximal degree in co-relation 19303. Up to 3013 conditions per place. [2024-06-20 17:03:41,371 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 43 changer transitions 0/210 dead transitions. [2024-06-20 17:03:41,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 210 transitions, 2370 flow [2024-06-20 17:03:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:03:41,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:03:41,372 INFO L175 Difference]: Start difference. First operand has 183 places, 194 transitions, 1926 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:03:41,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 210 transitions, 2370 flow [2024-06-20 17:03:41,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 210 transitions, 2282 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:41,544 INFO L231 Difference]: Finished difference. Result has 183 places, 197 transitions, 1968 flow [2024-06-20 17:03:41,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1968, PETRI_PLACES=183, PETRI_TRANSITIONS=197} [2024-06-20 17:03:41,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 17:03:41,544 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 197 transitions, 1968 flow [2024-06-20 17:03:41,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:41,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:41,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:03:41,545 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)] === [2024-06-20 17:03:41,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 304013477, now seen corresponding path program 1 times [2024-06-20 17:03:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308853906] [2024-06-20 17:03:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308853906] [2024-06-20 17:03:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308853906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:43,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256479605] [2024-06-20 17:03:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:43,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:43,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 197 transitions, 1968 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:43,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:43,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:43,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:44,821 INFO L124 PetriNetUnfolderBase]: 2157/3619 cut-off events. [2024-06-20 17:03:44,821 INFO L125 PetriNetUnfolderBase]: For 123876/123878 co-relation queries the response was YES. [2024-06-20 17:03:44,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 3619 events. 2157/3619 cut-off events. For 123876/123878 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21979 event pairs, 514 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 20636. Up to 3378 conditions per place. [2024-06-20 17:03:44,854 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-20 17:03:44,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 224 transitions, 2642 flow [2024-06-20 17:03:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:03:44,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:03:44,856 INFO L175 Difference]: Start difference. First operand has 183 places, 197 transitions, 1968 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:03:44,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 224 transitions, 2642 flow [2024-06-20 17:03:45,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 224 transitions, 2534 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:03:45,010 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2002 flow [2024-06-20 17:03:45,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2002, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-20 17:03:45,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-20 17:03:45,011 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2002 flow [2024-06-20 17:03:45,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:45,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:45,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:45,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:03:45,011 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)] === [2024-06-20 17:03:45,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1437684813, now seen corresponding path program 1 times [2024-06-20 17:03:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114766102] [2024-06-20 17:03:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114766102] [2024-06-20 17:03:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114766102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:46,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:46,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192526680] [2024-06-20 17:03:46,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:46,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:46,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:47,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2002 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:47,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:47,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:47,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:48,390 INFO L124 PetriNetUnfolderBase]: 2172/3640 cut-off events. [2024-06-20 17:03:48,390 INFO L125 PetriNetUnfolderBase]: For 130497/130499 co-relation queries the response was YES. [2024-06-20 17:03:48,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21098 conditions, 3640 events. 2172/3640 cut-off events. For 130497/130499 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22033 event pairs, 510 based on Foata normal form. 2/3640 useless extension candidates. Maximal degree in co-relation 21012. Up to 3391 conditions per place. [2024-06-20 17:03:48,421 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-20 17:03:48,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2704 flow [2024-06-20 17:03:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:03:48,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:03:48,423 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2002 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:03:48,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2704 flow [2024-06-20 17:03:48,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 232 transitions, 2642 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:48,577 INFO L231 Difference]: Finished difference. Result has 191 places, 212 transitions, 2108 flow [2024-06-20 17:03:48,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2108, PETRI_PLACES=191, PETRI_TRANSITIONS=212} [2024-06-20 17:03:48,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 17:03:48,578 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 212 transitions, 2108 flow [2024-06-20 17:03:48,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:48,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:48,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:48,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:03:48,578 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)] === [2024-06-20 17:03:48,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 304133447, now seen corresponding path program 2 times [2024-06-20 17:03:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202102504] [2024-06-20 17:03:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202102504] [2024-06-20 17:03:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202102504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066375143] [2024-06-20 17:03:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:50,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:50,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 212 transitions, 2108 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:50,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:50,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:50,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:52,083 INFO L124 PetriNetUnfolderBase]: 2177/3649 cut-off events. [2024-06-20 17:03:52,083 INFO L125 PetriNetUnfolderBase]: For 135382/135384 co-relation queries the response was YES. [2024-06-20 17:03:52,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21477 conditions, 3649 events. 2177/3649 cut-off events. For 135382/135384 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22133 event pairs, 515 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 21388. Up to 3420 conditions per place. [2024-06-20 17:03:52,115 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-20 17:03:52,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 231 transitions, 2648 flow [2024-06-20 17:03:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:03:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:03:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:03:52,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-20 17:03:52,117 INFO L175 Difference]: Start difference. First operand has 191 places, 212 transitions, 2108 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:03:52,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 231 transitions, 2648 flow [2024-06-20 17:03:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 231 transitions, 2598 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 17:03:52,267 INFO L231 Difference]: Finished difference. Result has 196 places, 215 transitions, 2152 flow [2024-06-20 17:03:52,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2152, PETRI_PLACES=196, PETRI_TRANSITIONS=215} [2024-06-20 17:03:52,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 17:03:52,268 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 215 transitions, 2152 flow [2024-06-20 17:03:52,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:52,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:52,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:52,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:03:52,269 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)] === [2024-06-20 17:03:52,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash -298417859, now seen corresponding path program 2 times [2024-06-20 17:03:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:52,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115884332] [2024-06-20 17:03:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115884332] [2024-06-20 17:03:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115884332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:54,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:54,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:54,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466952986] [2024-06-20 17:03:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:54,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:54,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 215 transitions, 2152 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:54,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:54,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:54,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:55,415 INFO L124 PetriNetUnfolderBase]: 2187/3664 cut-off events. [2024-06-20 17:03:55,415 INFO L125 PetriNetUnfolderBase]: For 142070/142075 co-relation queries the response was YES. [2024-06-20 17:03:55,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21677 conditions, 3664 events. 2187/3664 cut-off events. For 142070/142075 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22223 event pairs, 516 based on Foata normal form. 4/3665 useless extension candidates. Maximal degree in co-relation 21586. Up to 3408 conditions per place. [2024-06-20 17:03:55,446 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 202 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-20 17:03:55,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 232 transitions, 2778 flow [2024-06-20 17:03:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:03:55,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 17:03:55,447 INFO L175 Difference]: Start difference. First operand has 196 places, 215 transitions, 2152 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:03:55,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 232 transitions, 2778 flow [2024-06-20 17:03:55,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 232 transitions, 2704 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:03:55,624 INFO L231 Difference]: Finished difference. Result has 196 places, 218 transitions, 2174 flow [2024-06-20 17:03:55,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2174, PETRI_PLACES=196, PETRI_TRANSITIONS=218} [2024-06-20 17:03:55,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 17:03:55,625 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 218 transitions, 2174 flow [2024-06-20 17:03:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:55,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:55,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:03:55,626 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)] === [2024-06-20 17:03:55,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash -298655195, now seen corresponding path program 3 times [2024-06-20 17:03:55,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:55,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605951636] [2024-06-20 17:03:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:03:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:03:57,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:03:57,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605951636] [2024-06-20 17:03:57,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605951636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:03:57,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:03:57,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:03:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458176335] [2024-06-20 17:03:57,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:03:57,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:03:57,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:03:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:03:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:03:57,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:03:57,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 218 transitions, 2174 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:57,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:03:57,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:03:57,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:03:59,019 INFO L124 PetriNetUnfolderBase]: 2184/3659 cut-off events. [2024-06-20 17:03:59,019 INFO L125 PetriNetUnfolderBase]: For 144728/144730 co-relation queries the response was YES. [2024-06-20 17:03:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21707 conditions, 3659 events. 2184/3659 cut-off events. For 144728/144730 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22138 event pairs, 515 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 21616. Up to 3416 conditions per place. [2024-06-20 17:03:59,054 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-20 17:03:59,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 237 transitions, 2692 flow [2024-06-20 17:03:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:03:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:03:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:03:59,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:03:59,055 INFO L175 Difference]: Start difference. First operand has 196 places, 218 transitions, 2174 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:03:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 237 transitions, 2692 flow [2024-06-20 17:03:59,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 237 transitions, 2600 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 17:03:59,275 INFO L231 Difference]: Finished difference. Result has 199 places, 218 transitions, 2144 flow [2024-06-20 17:03:59,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2144, PETRI_PLACES=199, PETRI_TRANSITIONS=218} [2024-06-20 17:03:59,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-20 17:03:59,276 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 218 transitions, 2144 flow [2024-06-20 17:03:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:03:59,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:03:59,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:03:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:03:59,276 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)] === [2024-06-20 17:03:59,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:03:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash -488370573, now seen corresponding path program 3 times [2024-06-20 17:03:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:03:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720544869] [2024-06-20 17:03:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:03:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:03:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:01,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:01,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720544869] [2024-06-20 17:04:01,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720544869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:01,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:01,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:04:01,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481887804] [2024-06-20 17:04:01,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:01,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:04:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:04:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:04:01,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:01,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 218 transitions, 2144 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:01,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:01,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:01,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:02,294 INFO L124 PetriNetUnfolderBase]: 2178/3651 cut-off events. [2024-06-20 17:04:02,294 INFO L125 PetriNetUnfolderBase]: For 148464/148466 co-relation queries the response was YES. [2024-06-20 17:04:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21606 conditions, 3651 events. 2178/3651 cut-off events. For 148464/148466 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22107 event pairs, 510 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 21514. Up to 3399 conditions per place. [2024-06-20 17:04:02,327 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-20 17:04:02,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 236 transitions, 2654 flow [2024-06-20 17:04:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:04:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:04:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:04:02,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:04:02,329 INFO L175 Difference]: Start difference. First operand has 199 places, 218 transitions, 2144 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:04:02,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 236 transitions, 2654 flow [2024-06-20 17:04:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 236 transitions, 2582 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:02,487 INFO L231 Difference]: Finished difference. Result has 200 places, 218 transitions, 2134 flow [2024-06-20 17:04:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2134, PETRI_PLACES=200, PETRI_TRANSITIONS=218} [2024-06-20 17:04:02,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 17:04:02,488 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 218 transitions, 2134 flow [2024-06-20 17:04:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:02,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:04:02,488 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)] === [2024-06-20 17:04:02,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash -298408931, now seen corresponding path program 1 times [2024-06-20 17:04:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508591848] [2024-06-20 17:04:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:05,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508591848] [2024-06-20 17:04:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508591848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:05,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:05,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295472929] [2024-06-20 17:04:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:05,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:05,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:04:05,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 218 transitions, 2134 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:05,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:05,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:04:05,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:06,345 INFO L124 PetriNetUnfolderBase]: 2018/3432 cut-off events. [2024-06-20 17:04:06,345 INFO L125 PetriNetUnfolderBase]: For 144769/144780 co-relation queries the response was YES. [2024-06-20 17:04:06,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20563 conditions, 3432 events. 2018/3432 cut-off events. For 144769/144780 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21069 event pairs, 477 based on Foata normal form. 11/3407 useless extension candidates. Maximal degree in co-relation 20470. Up to 3128 conditions per place. [2024-06-20 17:04:06,378 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 200 selfloop transitions, 12 changer transitions 0/233 dead transitions. [2024-06-20 17:04:06,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 233 transitions, 2622 flow [2024-06-20 17:04:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:04:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:04:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 17:04:06,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:04:06,379 INFO L175 Difference]: Start difference. First operand has 200 places, 218 transitions, 2134 flow. Second operand 6 states and 102 transitions. [2024-06-20 17:04:06,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 233 transitions, 2622 flow [2024-06-20 17:04:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 233 transitions, 2560 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:06,609 INFO L231 Difference]: Finished difference. Result has 200 places, 220 transitions, 2135 flow [2024-06-20 17:04:06,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2135, PETRI_PLACES=200, PETRI_TRANSITIONS=220} [2024-06-20 17:04:06,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 17:04:06,610 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 220 transitions, 2135 flow [2024-06-20 17:04:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:06,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:06,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:06,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:04:06,611 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)] === [2024-06-20 17:04:06,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:06,611 INFO L85 PathProgramCache]: Analyzing trace with hash 834484728, now seen corresponding path program 1 times [2024-06-20 17:04:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026604715] [2024-06-20 17:04:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026604715] [2024-06-20 17:04:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026604715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:08,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698726596] [2024-06-20 17:04:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:08,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:08,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 220 transitions, 2135 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:08,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:08,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:10,545 INFO L124 PetriNetUnfolderBase]: 2183/3662 cut-off events. [2024-06-20 17:04:10,545 INFO L125 PetriNetUnfolderBase]: For 145971/145973 co-relation queries the response was YES. [2024-06-20 17:04:10,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21587 conditions, 3662 events. 2183/3662 cut-off events. For 145971/145973 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22211 event pairs, 507 based on Foata normal form. 2/3662 useless extension candidates. Maximal degree in co-relation 21494. Up to 3357 conditions per place. [2024-06-20 17:04:10,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-20 17:04:10,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 2877 flow [2024-06-20 17:04:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:04:10,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:04:10,589 INFO L175 Difference]: Start difference. First operand has 200 places, 220 transitions, 2135 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:04:10,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 2877 flow [2024-06-20 17:04:10,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 252 transitions, 2830 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:10,820 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2260 flow [2024-06-20 17:04:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2260, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-20 17:04:10,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 17:04:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2260 flow [2024-06-20 17:04:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:10,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:10,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:04:10,822 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)] === [2024-06-20 17:04:10,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1618554896, now seen corresponding path program 2 times [2024-06-20 17:04:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016192643] [2024-06-20 17:04:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016192643] [2024-06-20 17:04:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016192643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:13,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15358930] [2024-06-20 17:04:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:13,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:13,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:13,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:13,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:13,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:13,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:13,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:14,768 INFO L124 PetriNetUnfolderBase]: 2209/3702 cut-off events. [2024-06-20 17:04:14,768 INFO L125 PetriNetUnfolderBase]: For 155576/155578 co-relation queries the response was YES. [2024-06-20 17:04:14,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22386 conditions, 3702 events. 2209/3702 cut-off events. For 155576/155578 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22417 event pairs, 508 based on Foata normal form. 2/3702 useless extension candidates. Maximal degree in co-relation 22292. Up to 3422 conditions per place. [2024-06-20 17:04:14,798 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 35 changer transitions 0/257 dead transitions. [2024-06-20 17:04:14,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 257 transitions, 3020 flow [2024-06-20 17:04:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 17:04:14,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-20 17:04:14,800 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2260 flow. Second operand 10 states and 157 transitions. [2024-06-20 17:04:14,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 257 transitions, 3020 flow [2024-06-20 17:04:14,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 257 transitions, 2936 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 17:04:14,962 INFO L231 Difference]: Finished difference. Result has 210 places, 232 transitions, 2350 flow [2024-06-20 17:04:14,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2350, PETRI_PLACES=210, PETRI_TRANSITIONS=232} [2024-06-20 17:04:14,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 17:04:14,962 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 232 transitions, 2350 flow [2024-06-20 17:04:14,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:14,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:14,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:14,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:04:14,963 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)] === [2024-06-20 17:04:14,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash 838203798, now seen corresponding path program 3 times [2024-06-20 17:04:14,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190008356] [2024-06-20 17:04:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:17,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:17,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190008356] [2024-06-20 17:04:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190008356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252707245] [2024-06-20 17:04:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:17,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:17,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 232 transitions, 2350 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:17,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:17,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:17,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:18,817 INFO L124 PetriNetUnfolderBase]: 2203/3690 cut-off events. [2024-06-20 17:04:18,817 INFO L125 PetriNetUnfolderBase]: For 158379/158381 co-relation queries the response was YES. [2024-06-20 17:04:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22368 conditions, 3690 events. 2203/3690 cut-off events. For 158379/158381 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22328 event pairs, 508 based on Foata normal form. 2/3690 useless extension candidates. Maximal degree in co-relation 22272. Up to 3417 conditions per place. [2024-06-20 17:04:18,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 215 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-20 17:04:18,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 254 transitions, 2904 flow [2024-06-20 17:04:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:04:18,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:04:18,857 INFO L175 Difference]: Start difference. First operand has 210 places, 232 transitions, 2350 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:04:18,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 254 transitions, 2904 flow [2024-06-20 17:04:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 254 transitions, 2812 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:19,165 INFO L231 Difference]: Finished difference. Result has 212 places, 232 transitions, 2332 flow [2024-06-20 17:04:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=212, PETRI_TRANSITIONS=232} [2024-06-20 17:04:19,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 17:04:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 232 transitions, 2332 flow [2024-06-20 17:04:19,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:19,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:04:19,167 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)] === [2024-06-20 17:04:19,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash -668374920, now seen corresponding path program 4 times [2024-06-20 17:04:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:19,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877556171] [2024-06-20 17:04:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877556171] [2024-06-20 17:04:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877556171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916522216] [2024-06-20 17:04:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 232 transitions, 2332 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:22,692 INFO L124 PetriNetUnfolderBase]: 2213/3708 cut-off events. [2024-06-20 17:04:22,693 INFO L125 PetriNetUnfolderBase]: For 163602/163604 co-relation queries the response was YES. [2024-06-20 17:04:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22574 conditions, 3708 events. 2213/3708 cut-off events. For 163602/163604 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22511 event pairs, 507 based on Foata normal form. 2/3708 useless extension candidates. Maximal degree in co-relation 22476. Up to 3396 conditions per place. [2024-06-20 17:04:22,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 45 changer transitions 0/260 dead transitions. [2024-06-20 17:04:22,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 260 transitions, 3060 flow [2024-06-20 17:04:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:04:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:04:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:04:22,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:04:22,731 INFO L175 Difference]: Start difference. First operand has 212 places, 232 transitions, 2332 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:04:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 260 transitions, 3060 flow [2024-06-20 17:04:22,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 260 transitions, 2992 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:04:22,961 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2410 flow [2024-06-20 17:04:22,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2410, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-20 17:04:22,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 17:04:22,961 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2410 flow [2024-06-20 17:04:22,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:22,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:22,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:22,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:04:22,962 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)] === [2024-06-20 17:04:22,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -661017690, now seen corresponding path program 5 times [2024-06-20 17:04:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654896646] [2024-06-20 17:04:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654896646] [2024-06-20 17:04:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654896646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515378000] [2024-06-20 17:04:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:25,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:25,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:25,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2410 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:25,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:25,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:25,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:26,804 INFO L124 PetriNetUnfolderBase]: 2223/3727 cut-off events. [2024-06-20 17:04:26,804 INFO L125 PetriNetUnfolderBase]: For 169870/169875 co-relation queries the response was YES. [2024-06-20 17:04:26,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22857 conditions, 3727 events. 2223/3727 cut-off events. For 169870/169875 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22642 event pairs, 512 based on Foata normal form. 4/3728 useless extension candidates. Maximal degree in co-relation 22758. Up to 3406 conditions per place. [2024-06-20 17:04:26,838 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 49 changer transitions 0/261 dead transitions. [2024-06-20 17:04:26,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 261 transitions, 3140 flow [2024-06-20 17:04:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:04:26,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:04:26,840 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2410 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:04:26,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 261 transitions, 3140 flow [2024-06-20 17:04:27,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 261 transitions, 3012 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:27,139 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2440 flow [2024-06-20 17:04:27,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2440, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-20 17:04:27,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 17:04:27,139 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2440 flow [2024-06-20 17:04:27,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:27,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:27,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:27,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:04:27,140 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)] === [2024-06-20 17:04:27,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2040382768, now seen corresponding path program 6 times [2024-06-20 17:04:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751316198] [2024-06-20 17:04:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:29,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751316198] [2024-06-20 17:04:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751316198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:29,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338015073] [2024-06-20 17:04:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:29,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:29,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2440 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:29,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:29,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:29,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:30,954 INFO L124 PetriNetUnfolderBase]: 2217/3718 cut-off events. [2024-06-20 17:04:30,954 INFO L125 PetriNetUnfolderBase]: For 166296/166298 co-relation queries the response was YES. [2024-06-20 17:04:30,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22641 conditions, 3718 events. 2217/3718 cut-off events. For 166296/166298 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22548 event pairs, 507 based on Foata normal form. 2/3718 useless extension candidates. Maximal degree in co-relation 22542. Up to 3401 conditions per place. [2024-06-20 17:04:30,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-20 17:04:30,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 266 transitions, 3034 flow [2024-06-20 17:04:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:04:30,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:04:30,987 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2440 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:04:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 266 transitions, 3034 flow [2024-06-20 17:04:31,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 266 transitions, 2894 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:04:31,230 INFO L231 Difference]: Finished difference. Result has 218 places, 238 transitions, 2410 flow [2024-06-20 17:04:31,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2410, PETRI_PLACES=218, PETRI_TRANSITIONS=238} [2024-06-20 17:04:31,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-20 17:04:31,231 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 238 transitions, 2410 flow [2024-06-20 17:04:31,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:31,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:31,231 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] [2024-06-20 17:04:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:04:31,232 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)] === [2024-06-20 17:04:31,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1435182598, now seen corresponding path program 1 times [2024-06-20 17:04:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288019409] [2024-06-20 17:04:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288019409] [2024-06-20 17:04:34,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288019409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:34,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:34,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:34,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610841672] [2024-06-20 17:04:34,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:34,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:34,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:34,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 238 transitions, 2410 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:34,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:34,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:36,110 INFO L124 PetriNetUnfolderBase]: 2230/3739 cut-off events. [2024-06-20 17:04:36,110 INFO L125 PetriNetUnfolderBase]: For 171995/172001 co-relation queries the response was YES. [2024-06-20 17:04:36,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22881 conditions, 3739 events. 2230/3739 cut-off events. For 171995/172001 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22744 event pairs, 519 based on Foata normal form. 7/3741 useless extension candidates. Maximal degree in co-relation 22781. Up to 3345 conditions per place. [2024-06-20 17:04:36,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 57 changer transitions 0/279 dead transitions. [2024-06-20 17:04:36,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 279 transitions, 3428 flow [2024-06-20 17:04:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:04:36,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:04:36,149 INFO L175 Difference]: Start difference. First operand has 218 places, 238 transitions, 2410 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:04:36,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 279 transitions, 3428 flow [2024-06-20 17:04:36,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3286 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:04:36,439 INFO L231 Difference]: Finished difference. Result has 216 places, 247 transitions, 2554 flow [2024-06-20 17:04:36,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2554, PETRI_PLACES=216, PETRI_TRANSITIONS=247} [2024-06-20 17:04:36,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 17:04:36,440 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 247 transitions, 2554 flow [2024-06-20 17:04:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:36,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:36,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:36,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:04:36,441 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)] === [2024-06-20 17:04:36,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1435302568, now seen corresponding path program 2 times [2024-06-20 17:04:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:36,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657501325] [2024-06-20 17:04:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657501325] [2024-06-20 17:04:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657501325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:39,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856579572] [2024-06-20 17:04:39,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:39,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:39,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 247 transitions, 2554 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:39,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:39,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:39,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:40,946 INFO L124 PetriNetUnfolderBase]: 2240/3757 cut-off events. [2024-06-20 17:04:40,946 INFO L125 PetriNetUnfolderBase]: For 173870/173879 co-relation queries the response was YES. [2024-06-20 17:04:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23293 conditions, 3757 events. 2240/3757 cut-off events. For 173870/173879 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22851 event pairs, 511 based on Foata normal form. 9/3763 useless extension candidates. Maximal degree in co-relation 23193. Up to 3429 conditions per place. [2024-06-20 17:04:40,985 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 42 changer transitions 0/279 dead transitions. [2024-06-20 17:04:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3267 flow [2024-06-20 17:04:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:04:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:04:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:04:40,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:04:40,987 INFO L175 Difference]: Start difference. First operand has 216 places, 247 transitions, 2554 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:04:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3267 flow [2024-06-20 17:04:41,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 279 transitions, 3152 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:41,285 INFO L231 Difference]: Finished difference. Result has 221 places, 253 transitions, 2622 flow [2024-06-20 17:04:41,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2622, PETRI_PLACES=221, PETRI_TRANSITIONS=253} [2024-06-20 17:04:41,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 17:04:41,285 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 253 transitions, 2622 flow [2024-06-20 17:04:41,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:41,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:41,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:41,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:04:41,286 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)] === [2024-06-20 17:04:41,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1732640488, now seen corresponding path program 1 times [2024-06-20 17:04:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:41,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026709954] [2024-06-20 17:04:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:41,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:44,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026709954] [2024-06-20 17:04:44,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026709954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:44,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:44,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:44,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175480476] [2024-06-20 17:04:44,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:44,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:44,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:44,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:44,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 253 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:44,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:44,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:44,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:45,719 INFO L124 PetriNetUnfolderBase]: 2282/3815 cut-off events. [2024-06-20 17:04:45,720 INFO L125 PetriNetUnfolderBase]: For 188164/188173 co-relation queries the response was YES. [2024-06-20 17:04:45,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24061 conditions, 3815 events. 2282/3815 cut-off events. For 188164/188173 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23150 event pairs, 513 based on Foata normal form. 10/3822 useless extension candidates. Maximal degree in co-relation 23959. Up to 3444 conditions per place. [2024-06-20 17:04:45,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 52 changer transitions 0/299 dead transitions. [2024-06-20 17:04:45,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 299 transitions, 3684 flow [2024-06-20 17:04:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:04:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:04:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:04:45,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 17:04:45,757 INFO L175 Difference]: Start difference. First operand has 221 places, 253 transitions, 2622 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:04:45,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 299 transitions, 3684 flow [2024-06-20 17:04:46,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 299 transitions, 3570 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:46,127 INFO L231 Difference]: Finished difference. Result has 227 places, 266 transitions, 2801 flow [2024-06-20 17:04:46,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2801, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2024-06-20 17:04:46,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 17:04:46,128 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 2801 flow [2024-06-20 17:04:46,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:46,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:46,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:46,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:04:46,129 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)] === [2024-06-20 17:04:46,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 383208086, now seen corresponding path program 2 times [2024-06-20 17:04:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:46,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71825722] [2024-06-20 17:04:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:48,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71825722] [2024-06-20 17:04:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71825722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:48,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:48,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:48,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024193716] [2024-06-20 17:04:48,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:48,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:48,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:48,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 2801 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:48,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:48,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:48,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:50,264 INFO L124 PetriNetUnfolderBase]: 2334/3887 cut-off events. [2024-06-20 17:04:50,264 INFO L125 PetriNetUnfolderBase]: For 202618/202627 co-relation queries the response was YES. [2024-06-20 17:04:50,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25200 conditions, 3887 events. 2334/3887 cut-off events. For 202618/202627 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23586 event pairs, 517 based on Foata normal form. 10/3894 useless extension candidates. Maximal degree in co-relation 25096. Up to 3492 conditions per place. [2024-06-20 17:04:50,299 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 64 changer transitions 0/310 dead transitions. [2024-06-20 17:04:50,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 3955 flow [2024-06-20 17:04:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:04:50,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:04:50,301 INFO L175 Difference]: Start difference. First operand has 227 places, 266 transitions, 2801 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:04:50,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 3955 flow [2024-06-20 17:04:50,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 3761 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-20 17:04:50,689 INFO L231 Difference]: Finished difference. Result has 231 places, 282 transitions, 2979 flow [2024-06-20 17:04:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2979, PETRI_PLACES=231, PETRI_TRANSITIONS=282} [2024-06-20 17:04:50,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-20 17:04:50,690 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 282 transitions, 2979 flow [2024-06-20 17:04:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:50,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:50,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:04:50,690 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)] === [2024-06-20 17:04:50,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1776786256, now seen corresponding path program 3 times [2024-06-20 17:04:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:50,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063018885] [2024-06-20 17:04:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:50,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063018885] [2024-06-20 17:04:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063018885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:53,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:53,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620348501] [2024-06-20 17:04:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:53,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:53,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 282 transitions, 2979 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:53,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:53,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:53,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:04:55,306 INFO L124 PetriNetUnfolderBase]: 2347/3913 cut-off events. [2024-06-20 17:04:55,306 INFO L125 PetriNetUnfolderBase]: For 208109/208118 co-relation queries the response was YES. [2024-06-20 17:04:55,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25396 conditions, 3913 events. 2347/3913 cut-off events. For 208109/208118 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23791 event pairs, 521 based on Foata normal form. 9/3919 useless extension candidates. Maximal degree in co-relation 25290. Up to 3568 conditions per place. [2024-06-20 17:04:55,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 54 changer transitions 0/312 dead transitions. [2024-06-20 17:04:55,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 3881 flow [2024-06-20 17:04:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:04:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:04:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:04:55,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 17:04:55,347 INFO L175 Difference]: Start difference. First operand has 231 places, 282 transitions, 2979 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:04:55,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 3881 flow [2024-06-20 17:04:55,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 312 transitions, 3795 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:04:55,703 INFO L231 Difference]: Finished difference. Result has 238 places, 288 transitions, 3129 flow [2024-06-20 17:04:55,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3129, PETRI_PLACES=238, PETRI_TRANSITIONS=288} [2024-06-20 17:04:55,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-20 17:04:55,704 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 288 transitions, 3129 flow [2024-06-20 17:04:55,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:55,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:04:55,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:04:55,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:04:55,705 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)] === [2024-06-20 17:04:55,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:04:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1776786442, now seen corresponding path program 3 times [2024-06-20 17:04:55,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:04:55,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859843249] [2024-06-20 17:04:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:04:55,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:04:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:04:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:04:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:04:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859843249] [2024-06-20 17:04:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859843249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:04:58,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:04:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:04:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375545797] [2024-06-20 17:04:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:04:58,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:04:58,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:04:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:04:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:04:58,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:04:58,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 288 transitions, 3129 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:04:58,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:04:58,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:04:58,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:00,074 INFO L124 PetriNetUnfolderBase]: 2341/3903 cut-off events. [2024-06-20 17:05:00,075 INFO L125 PetriNetUnfolderBase]: For 213175/213184 co-relation queries the response was YES. [2024-06-20 17:05:00,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25327 conditions, 3903 events. 2341/3903 cut-off events. For 213175/213184 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23737 event pairs, 516 based on Foata normal form. 10/3910 useless extension candidates. Maximal degree in co-relation 25219. Up to 3505 conditions per place. [2024-06-20 17:05:00,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 248 selfloop transitions, 66 changer transitions 0/319 dead transitions. [2024-06-20 17:05:00,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 319 transitions, 4077 flow [2024-06-20 17:05:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:05:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:05:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 17:05:00,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:05:00,115 INFO L175 Difference]: Start difference. First operand has 238 places, 288 transitions, 3129 flow. Second operand 11 states and 176 transitions. [2024-06-20 17:05:00,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 319 transitions, 4077 flow [2024-06-20 17:05:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 319 transitions, 3923 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:00,443 INFO L231 Difference]: Finished difference. Result has 244 places, 288 transitions, 3113 flow [2024-06-20 17:05:00,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3113, PETRI_PLACES=244, PETRI_TRANSITIONS=288} [2024-06-20 17:05:00,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 17:05:00,444 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 288 transitions, 3113 flow [2024-06-20 17:05:00,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:00,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:00,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:05:00,444 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)] === [2024-06-20 17:05:00,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1612680352, now seen corresponding path program 1 times [2024-06-20 17:05:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805954077] [2024-06-20 17:05:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:03,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:03,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805954077] [2024-06-20 17:05:03,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805954077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:03,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:03,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:05:03,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790977215] [2024-06-20 17:05:03,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:05:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:05:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:05:03,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:05:03,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 288 transitions, 3113 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:03,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:03,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:05:03,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:05,255 INFO L124 PetriNetUnfolderBase]: 2232/3751 cut-off events. [2024-06-20 17:05:05,255 INFO L125 PetriNetUnfolderBase]: For 237128/237141 co-relation queries the response was YES. [2024-06-20 17:05:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24836 conditions, 3751 events. 2232/3751 cut-off events. For 237128/237141 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23003 event pairs, 484 based on Foata normal form. 21/3730 useless extension candidates. Maximal degree in co-relation 24727. Up to 3259 conditions per place. [2024-06-20 17:05:05,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 46 changer transitions 0/317 dead transitions. [2024-06-20 17:05:05,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 317 transitions, 3785 flow [2024-06-20 17:05:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:05:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:05:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:05:05,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:05:05,298 INFO L175 Difference]: Start difference. First operand has 244 places, 288 transitions, 3113 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:05:05,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 317 transitions, 3785 flow [2024-06-20 17:05:05,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 317 transitions, 3633 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:05:05,755 INFO L231 Difference]: Finished difference. Result has 244 places, 289 transitions, 3077 flow [2024-06-20 17:05:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3077, PETRI_PLACES=244, PETRI_TRANSITIONS=289} [2024-06-20 17:05:05,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 17:05:05,756 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 289 transitions, 3077 flow [2024-06-20 17:05:05,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:05,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:05,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:05,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:05:05,756 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)] === [2024-06-20 17:05:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:05,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1009600312, now seen corresponding path program 4 times [2024-06-20 17:05:05,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:05,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112589751] [2024-06-20 17:05:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:08,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:08,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112589751] [2024-06-20 17:05:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112589751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:08,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:08,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228819298] [2024-06-20 17:05:08,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:08,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:08,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:08,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:08,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 289 transitions, 3077 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:08,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:08,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:08,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:10,293 INFO L124 PetriNetUnfolderBase]: 2398/3990 cut-off events. [2024-06-20 17:05:10,293 INFO L125 PetriNetUnfolderBase]: For 228178/228194 co-relation queries the response was YES. [2024-06-20 17:05:10,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26165 conditions, 3990 events. 2398/3990 cut-off events. For 228178/228194 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24259 event pairs, 529 based on Foata normal form. 15/4001 useless extension candidates. Maximal degree in co-relation 26055. Up to 3569 conditions per place. [2024-06-20 17:05:10,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 80 changer transitions 0/325 dead transitions. [2024-06-20 17:05:10,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 325 transitions, 4287 flow [2024-06-20 17:05:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:05:10,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:05:10,337 INFO L175 Difference]: Start difference. First operand has 244 places, 289 transitions, 3077 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:05:10,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 325 transitions, 4287 flow [2024-06-20 17:05:10,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 325 transitions, 4193 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:10,726 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3265 flow [2024-06-20 17:05:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-06-20 17:05:10,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:05:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3265 flow [2024-06-20 17:05:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:10,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:10,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:05:10,728 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)] === [2024-06-20 17:05:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -139998552, now seen corresponding path program 5 times [2024-06-20 17:05:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:10,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744450852] [2024-06-20 17:05:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:13,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744450852] [2024-06-20 17:05:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744450852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:13,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:13,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489334746] [2024-06-20 17:05:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:13,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:13,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:13,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:13,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:15,234 INFO L124 PetriNetUnfolderBase]: 2395/3986 cut-off events. [2024-06-20 17:05:15,235 INFO L125 PetriNetUnfolderBase]: For 232631/232647 co-relation queries the response was YES. [2024-06-20 17:05:15,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26189 conditions, 3986 events. 2395/3986 cut-off events. For 232631/232647 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24226 event pairs, 529 based on Foata normal form. 15/3997 useless extension candidates. Maximal degree in co-relation 26078. Up to 3649 conditions per place. [2024-06-20 17:05:15,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 49 changer transitions 0/318 dead transitions. [2024-06-20 17:05:15,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 318 transitions, 3961 flow [2024-06-20 17:05:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:05:15,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:05:15,279 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3265 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:05:15,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 318 transitions, 3961 flow [2024-06-20 17:05:15,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 318 transitions, 3706 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:15,731 INFO L231 Difference]: Finished difference. Result has 248 places, 295 transitions, 3114 flow [2024-06-20 17:05:15,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3114, PETRI_PLACES=248, PETRI_TRANSITIONS=295} [2024-06-20 17:05:15,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-20 17:05:15,731 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 295 transitions, 3114 flow [2024-06-20 17:05:15,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:15,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:15,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:05:15,732 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)] === [2024-06-20 17:05:15,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -139998366, now seen corresponding path program 4 times [2024-06-20 17:05:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:15,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328420299] [2024-06-20 17:05:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328420299] [2024-06-20 17:05:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328420299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435308298] [2024-06-20 17:05:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:18,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:18,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 295 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:18,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:18,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:18,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:19,936 INFO L124 PetriNetUnfolderBase]: 2389/3982 cut-off events. [2024-06-20 17:05:19,936 INFO L125 PetriNetUnfolderBase]: For 236390/236406 co-relation queries the response was YES. [2024-06-20 17:05:19,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25948 conditions, 3982 events. 2389/3982 cut-off events. For 236390/236406 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24268 event pairs, 536 based on Foata normal form. 16/3994 useless extension candidates. Maximal degree in co-relation 25836. Up to 3629 conditions per place. [2024-06-20 17:05:19,977 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 52 changer transitions 0/324 dead transitions. [2024-06-20 17:05:19,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 324 transitions, 3984 flow [2024-06-20 17:05:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:05:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:05:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:05:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:05:19,979 INFO L175 Difference]: Start difference. First operand has 248 places, 295 transitions, 3114 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:05:19,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 324 transitions, 3984 flow [2024-06-20 17:05:20,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 324 transitions, 3856 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:20,392 INFO L231 Difference]: Finished difference. Result has 252 places, 297 transitions, 3132 flow [2024-06-20 17:05:20,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3132, PETRI_PLACES=252, PETRI_TRANSITIONS=297} [2024-06-20 17:05:20,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 17:05:20,393 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 297 transitions, 3132 flow [2024-06-20 17:05:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:20,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:20,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:05:20,393 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)] === [2024-06-20 17:05:20,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 87782628, now seen corresponding path program 6 times [2024-06-20 17:05:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:20,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263244800] [2024-06-20 17:05:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263244800] [2024-06-20 17:05:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263244800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:23,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:23,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497895957] [2024-06-20 17:05:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:23,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:23,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 297 transitions, 3132 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:23,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:23,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:23,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:24,877 INFO L124 PetriNetUnfolderBase]: 2394/3989 cut-off events. [2024-06-20 17:05:24,878 INFO L125 PetriNetUnfolderBase]: For 241216/241232 co-relation queries the response was YES. [2024-06-20 17:05:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26116 conditions, 3989 events. 2394/3989 cut-off events. For 241216/241232 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24256 event pairs, 530 based on Foata normal form. 15/4000 useless extension candidates. Maximal degree in co-relation 26002. Up to 3564 conditions per place. [2024-06-20 17:05:24,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 87 changer transitions 0/329 dead transitions. [2024-06-20 17:05:24,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 329 transitions, 4172 flow [2024-06-20 17:05:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:05:24,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:05:24,921 INFO L175 Difference]: Start difference. First operand has 252 places, 297 transitions, 3132 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:05:24,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 329 transitions, 4172 flow [2024-06-20 17:05:25,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 329 transitions, 4072 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:25,327 INFO L231 Difference]: Finished difference. Result has 254 places, 300 transitions, 3262 flow [2024-06-20 17:05:25,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=254, PETRI_TRANSITIONS=300} [2024-06-20 17:05:25,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-20 17:05:25,327 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 300 transitions, 3262 flow [2024-06-20 17:05:25,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:25,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:25,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:25,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:05:25,328 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)] === [2024-06-20 17:05:25,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1248929302, now seen corresponding path program 7 times [2024-06-20 17:05:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:25,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032763453] [2024-06-20 17:05:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:25,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:28,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032763453] [2024-06-20 17:05:28,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032763453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:28,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:28,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:28,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717702755] [2024-06-20 17:05:28,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:28,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:28,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:28,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:28,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 300 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:28,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:28,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:28,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:29,593 INFO L124 PetriNetUnfolderBase]: 2399/3992 cut-off events. [2024-06-20 17:05:29,593 INFO L125 PetriNetUnfolderBase]: For 248510/248526 co-relation queries the response was YES. [2024-06-20 17:05:29,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26384 conditions, 3992 events. 2399/3992 cut-off events. For 248510/248526 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24268 event pairs, 528 based on Foata normal form. 15/4003 useless extension candidates. Maximal degree in co-relation 26269. Up to 3570 conditions per place. [2024-06-20 17:05:29,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 90 changer transitions 0/327 dead transitions. [2024-06-20 17:05:29,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 327 transitions, 4164 flow [2024-06-20 17:05:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:05:29,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:05:29,634 INFO L175 Difference]: Start difference. First operand has 254 places, 300 transitions, 3262 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:05:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 327 transitions, 4164 flow [2024-06-20 17:05:30,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 327 transitions, 3925 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:05:30,047 INFO L231 Difference]: Finished difference. Result has 256 places, 303 transitions, 3265 flow [2024-06-20 17:05:30,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=256, PETRI_TRANSITIONS=303} [2024-06-20 17:05:30,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 17:05:30,048 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 303 transitions, 3265 flow [2024-06-20 17:05:30,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:30,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:30,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:30,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:05:30,049 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)] === [2024-06-20 17:05:30,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:30,050 INFO L85 PathProgramCache]: Analyzing trace with hash 214501638, now seen corresponding path program 8 times [2024-06-20 17:05:30,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:30,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041482561] [2024-06-20 17:05:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:30,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:32,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041482561] [2024-06-20 17:05:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041482561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:32,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60739714] [2024-06-20 17:05:32,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:32,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:32,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:32,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 303 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:32,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:32,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:32,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:34,159 INFO L124 PetriNetUnfolderBase]: 2417/4023 cut-off events. [2024-06-20 17:05:34,160 INFO L125 PetriNetUnfolderBase]: For 257766/257782 co-relation queries the response was YES. [2024-06-20 17:05:34,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26719 conditions, 4023 events. 2417/4023 cut-off events. For 257766/257782 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24523 event pairs, 536 based on Foata normal form. 15/4034 useless extension candidates. Maximal degree in co-relation 26603. Up to 3666 conditions per place. [2024-06-20 17:05:34,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 63 changer transitions 0/332 dead transitions. [2024-06-20 17:05:34,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 332 transitions, 4259 flow [2024-06-20 17:05:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:05:34,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:05:34,199 INFO L175 Difference]: Start difference. First operand has 256 places, 303 transitions, 3265 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:05:34,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 332 transitions, 4259 flow [2024-06-20 17:05:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 332 transitions, 4083 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:34,658 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3397 flow [2024-06-20 17:05:34,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3397, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-20 17:05:34,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 17:05:34,659 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3397 flow [2024-06-20 17:05:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:34,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:34,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:05:34,659 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)] === [2024-06-20 17:05:34,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1364399218, now seen corresponding path program 5 times [2024-06-20 17:05:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106031507] [2024-06-20 17:05:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106031507] [2024-06-20 17:05:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106031507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837381932] [2024-06-20 17:05:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:37,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:37,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3397 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:37,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:37,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:39,013 INFO L124 PetriNetUnfolderBase]: 2443/4057 cut-off events. [2024-06-20 17:05:39,013 INFO L125 PetriNetUnfolderBase]: For 272204/272220 co-relation queries the response was YES. [2024-06-20 17:05:39,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27159 conditions, 4057 events. 2443/4057 cut-off events. For 272204/272220 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24701 event pairs, 519 based on Foata normal form. 16/4069 useless extension candidates. Maximal degree in co-relation 27041. Up to 3586 conditions per place. [2024-06-20 17:05:39,053 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 85 changer transitions 0/349 dead transitions. [2024-06-20 17:05:39,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 349 transitions, 4597 flow [2024-06-20 17:05:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:05:39,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:05:39,054 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3397 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:05:39,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 349 transitions, 4597 flow [2024-06-20 17:05:39,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 349 transitions, 4483 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:05:39,468 INFO L231 Difference]: Finished difference. Result has 266 places, 324 transitions, 3667 flow [2024-06-20 17:05:39,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=266, PETRI_TRANSITIONS=324} [2024-06-20 17:05:39,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:05:39,468 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 324 transitions, 3667 flow [2024-06-20 17:05:39,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:39,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:39,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:05:39,469 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)] === [2024-06-20 17:05:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 214264488, now seen corresponding path program 9 times [2024-06-20 17:05:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:39,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37600872] [2024-06-20 17:05:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:42,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:42,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37600872] [2024-06-20 17:05:42,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37600872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:42,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:42,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420533471] [2024-06-20 17:05:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:42,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:42,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 324 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:42,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:42,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:42,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:44,168 INFO L124 PetriNetUnfolderBase]: 2440/4051 cut-off events. [2024-06-20 17:05:44,169 INFO L125 PetriNetUnfolderBase]: For 276525/276541 co-relation queries the response was YES. [2024-06-20 17:05:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27548 conditions, 4051 events. 2440/4051 cut-off events. For 276525/276541 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24640 event pairs, 529 based on Foata normal form. 15/4062 useless extension candidates. Maximal degree in co-relation 27428. Up to 3699 conditions per place. [2024-06-20 17:05:44,217 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 64 changer transitions 0/345 dead transitions. [2024-06-20 17:05:44,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 345 transitions, 4409 flow [2024-06-20 17:05:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:05:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:05:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-20 17:05:44,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-20 17:05:44,219 INFO L175 Difference]: Start difference. First operand has 266 places, 324 transitions, 3667 flow. Second operand 10 states and 153 transitions. [2024-06-20 17:05:44,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 345 transitions, 4409 flow [2024-06-20 17:05:44,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 345 transitions, 4283 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 17:05:44,762 INFO L231 Difference]: Finished difference. Result has 273 places, 324 transitions, 3675 flow [2024-06-20 17:05:44,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3675, PETRI_PLACES=273, PETRI_TRANSITIONS=324} [2024-06-20 17:05:44,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-20 17:05:44,763 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 324 transitions, 3675 flow [2024-06-20 17:05:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:44,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:44,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:44,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:05:44,763 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)] === [2024-06-20 17:05:44,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 214264674, now seen corresponding path program 6 times [2024-06-20 17:05:44,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:44,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767155876] [2024-06-20 17:05:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767155876] [2024-06-20 17:05:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767155876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:47,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088343958] [2024-06-20 17:05:47,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:47,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:47,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:47,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:47,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:47,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 324 transitions, 3675 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:47,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:47,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:47,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:48,895 INFO L124 PetriNetUnfolderBase]: 2434/4043 cut-off events. [2024-06-20 17:05:48,895 INFO L125 PetriNetUnfolderBase]: For 280452/280468 co-relation queries the response was YES. [2024-06-20 17:05:48,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27291 conditions, 4043 events. 2434/4043 cut-off events. For 280452/280468 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24582 event pairs, 528 based on Foata normal form. 16/4055 useless extension candidates. Maximal degree in co-relation 27169. Up to 3700 conditions per place. [2024-06-20 17:05:48,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 52 changer transitions 0/344 dead transitions. [2024-06-20 17:05:48,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 344 transitions, 4413 flow [2024-06-20 17:05:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:05:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:05:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:05:48,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 17:05:48,943 INFO L175 Difference]: Start difference. First operand has 273 places, 324 transitions, 3675 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:05:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 344 transitions, 4413 flow [2024-06-20 17:05:49,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 4229 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 17:05:49,526 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 3601 flow [2024-06-20 17:05:49,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3601, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-20 17:05:49,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 17:05:49,528 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 3601 flow [2024-06-20 17:05:49,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:49,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:49,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:49,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:05:49,529 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)] === [2024-06-20 17:05:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:49,530 INFO L85 PathProgramCache]: Analyzing trace with hash 977567612, now seen corresponding path program 7 times [2024-06-20 17:05:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:49,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874103682] [2024-06-20 17:05:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:52,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:52,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874103682] [2024-06-20 17:05:52,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874103682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:52,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:52,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:52,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642609768] [2024-06-20 17:05:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:52,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:52,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:52,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 3601 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:52,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:52,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:52,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:54,176 INFO L124 PetriNetUnfolderBase]: 2444/4062 cut-off events. [2024-06-20 17:05:54,176 INFO L125 PetriNetUnfolderBase]: For 289139/289174 co-relation queries the response was YES. [2024-06-20 17:05:54,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27442 conditions, 4062 events. 2444/4062 cut-off events. For 289139/289174 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24800 event pairs, 538 based on Foata normal form. 24/4079 useless extension candidates. Maximal degree in co-relation 27320. Up to 3587 conditions per place. [2024-06-20 17:05:54,219 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-20 17:05:54,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 346 transitions, 4671 flow [2024-06-20 17:05:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:05:54,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:05:54,221 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 3601 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:05:54,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 346 transitions, 4671 flow [2024-06-20 17:05:54,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 346 transitions, 4555 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:05:54,748 INFO L231 Difference]: Finished difference. Result has 271 places, 327 transitions, 3717 flow [2024-06-20 17:05:54,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3717, PETRI_PLACES=271, PETRI_TRANSITIONS=327} [2024-06-20 17:05:54,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 17:05:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 327 transitions, 3717 flow [2024-06-20 17:05:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:05:54,750 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)] === [2024-06-20 17:05:54,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash 578070302, now seen corresponding path program 8 times [2024-06-20 17:05:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335793753] [2024-06-20 17:05:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:05:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:05:57,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:05:57,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335793753] [2024-06-20 17:05:57,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335793753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:05:57,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:05:57,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:05:57,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053291710] [2024-06-20 17:05:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:05:57,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:05:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:05:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:05:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:05:57,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:05:57,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 327 transitions, 3717 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:57,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:05:57,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:05:57,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:05:58,707 INFO L124 PetriNetUnfolderBase]: 2454/4070 cut-off events. [2024-06-20 17:05:58,707 INFO L125 PetriNetUnfolderBase]: For 296032/296041 co-relation queries the response was YES. [2024-06-20 17:05:58,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27772 conditions, 4070 events. 2454/4070 cut-off events. For 296032/296041 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24767 event pairs, 526 based on Foata normal form. 10/4077 useless extension candidates. Maximal degree in co-relation 27649. Up to 3662 conditions per place. [2024-06-20 17:05:58,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 73 changer transitions 0/354 dead transitions. [2024-06-20 17:05:58,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 354 transitions, 4674 flow [2024-06-20 17:05:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:05:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:05:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:05:58,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:05:58,757 INFO L175 Difference]: Start difference. First operand has 271 places, 327 transitions, 3717 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:05:58,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 354 transitions, 4674 flow [2024-06-20 17:05:59,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 354 transitions, 4385 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 17:05:59,341 INFO L231 Difference]: Finished difference. Result has 273 places, 330 transitions, 3631 flow [2024-06-20 17:05:59,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3631, PETRI_PLACES=273, PETRI_TRANSITIONS=330} [2024-06-20 17:05:59,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-20 17:05:59,341 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 330 transitions, 3631 flow [2024-06-20 17:05:59,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:05:59,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:05:59,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:05:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:05:59,342 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)] === [2024-06-20 17:05:59,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:05:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 983281532, now seen corresponding path program 9 times [2024-06-20 17:05:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:05:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984192473] [2024-06-20 17:05:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:05:59,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:05:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984192473] [2024-06-20 17:06:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984192473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150998523] [2024-06-20 17:06:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 330 transitions, 3631 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:03,520 INFO L124 PetriNetUnfolderBase]: 2464/4090 cut-off events. [2024-06-20 17:06:03,520 INFO L125 PetriNetUnfolderBase]: For 304417/304452 co-relation queries the response was YES. [2024-06-20 17:06:03,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27612 conditions, 4090 events. 2464/4090 cut-off events. For 304417/304452 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24904 event pairs, 539 based on Foata normal form. 24/4107 useless extension candidates. Maximal degree in co-relation 27489. Up to 3607 conditions per place. [2024-06-20 17:06:03,565 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 92 changer transitions 0/351 dead transitions. [2024-06-20 17:06:03,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 351 transitions, 4554 flow [2024-06-20 17:06:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:06:03,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:06:03,567 INFO L175 Difference]: Start difference. First operand has 273 places, 330 transitions, 3631 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:06:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 351 transitions, 4554 flow [2024-06-20 17:06:04,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 351 transitions, 4421 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:04,186 INFO L231 Difference]: Finished difference. Result has 275 places, 333 transitions, 3725 flow [2024-06-20 17:06:04,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3725, PETRI_PLACES=275, PETRI_TRANSITIONS=333} [2024-06-20 17:06:04,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 17:06:04,187 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 333 transitions, 3725 flow [2024-06-20 17:06:04,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:04,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:04,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:04,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:06:04,187 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)] === [2024-06-20 17:06:04,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash 577833152, now seen corresponding path program 10 times [2024-06-20 17:06:04,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:04,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807525919] [2024-06-20 17:06:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:04,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:07,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:07,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807525919] [2024-06-20 17:06:07,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807525919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:07,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:07,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609822739] [2024-06-20 17:06:07,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:07,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:07,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:07,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:07,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 333 transitions, 3725 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:07,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:07,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:07,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:08,436 INFO L124 PetriNetUnfolderBase]: 2458/4076 cut-off events. [2024-06-20 17:06:08,437 INFO L125 PetriNetUnfolderBase]: For 298346/298355 co-relation queries the response was YES. [2024-06-20 17:06:08,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27469 conditions, 4076 events. 2458/4076 cut-off events. For 298346/298355 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24792 event pairs, 527 based on Foata normal form. 10/4083 useless extension candidates. Maximal degree in co-relation 27346. Up to 3671 conditions per place. [2024-06-20 17:06:08,477 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 78 changer transitions 0/364 dead transitions. [2024-06-20 17:06:08,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 364 transitions, 4675 flow [2024-06-20 17:06:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:06:08,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:06:08,479 INFO L175 Difference]: Start difference. First operand has 275 places, 333 transitions, 3725 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:06:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 364 transitions, 4675 flow [2024-06-20 17:06:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 364 transitions, 4506 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:09,124 INFO L231 Difference]: Finished difference. Result has 280 places, 333 transitions, 3726 flow [2024-06-20 17:06:09,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3726, PETRI_PLACES=280, PETRI_TRANSITIONS=333} [2024-06-20 17:06:09,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 17:06:09,124 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 333 transitions, 3726 flow [2024-06-20 17:06:09,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:09,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:09,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:06:09,125 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)] === [2024-06-20 17:06:09,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 577832966, now seen corresponding path program 10 times [2024-06-20 17:06:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812299181] [2024-06-20 17:06:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812299181] [2024-06-20 17:06:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812299181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:11,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:11,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118422727] [2024-06-20 17:06:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:11,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:11,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:11,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 333 transitions, 3726 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:11,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:11,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:11,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:13,822 INFO L124 PetriNetUnfolderBase]: 2455/4076 cut-off events. [2024-06-20 17:06:13,822 INFO L125 PetriNetUnfolderBase]: For 300720/300729 co-relation queries the response was YES. [2024-06-20 17:06:13,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27417 conditions, 4076 events. 2455/4076 cut-off events. For 300720/300729 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24833 event pairs, 533 based on Foata normal form. 9/4082 useless extension candidates. Maximal degree in co-relation 27293. Up to 3660 conditions per place. [2024-06-20 17:06:13,868 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 90 changer transitions 0/373 dead transitions. [2024-06-20 17:06:13,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 373 transitions, 4726 flow [2024-06-20 17:06:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:06:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:06:13,870 INFO L175 Difference]: Start difference. First operand has 280 places, 333 transitions, 3726 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:06:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 373 transitions, 4726 flow [2024-06-20 17:06:14,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 373 transitions, 4507 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 17:06:14,498 INFO L231 Difference]: Finished difference. Result has 279 places, 333 transitions, 3709 flow [2024-06-20 17:06:14,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3709, PETRI_PLACES=279, PETRI_TRANSITIONS=333} [2024-06-20 17:06:14,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-20 17:06:14,499 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 333 transitions, 3709 flow [2024-06-20 17:06:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:14,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:14,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:06:14,499 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)] === [2024-06-20 17:06:14,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 754964486, now seen corresponding path program 11 times [2024-06-20 17:06:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:14,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751074969] [2024-06-20 17:06:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:17,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:17,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751074969] [2024-06-20 17:06:17,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751074969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:17,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:17,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492955785] [2024-06-20 17:06:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:17,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:17,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 333 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:17,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:17,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:17,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:19,611 INFO L124 PetriNetUnfolderBase]: 2452/4069 cut-off events. [2024-06-20 17:06:19,612 INFO L125 PetriNetUnfolderBase]: For 290177/290193 co-relation queries the response was YES. [2024-06-20 17:06:19,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27194 conditions, 4069 events. 2452/4069 cut-off events. For 290177/290193 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24786 event pairs, 533 based on Foata normal form. 15/4080 useless extension candidates. Maximal degree in co-relation 27071. Up to 3657 conditions per place. [2024-06-20 17:06:19,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 90 changer transitions 0/370 dead transitions. [2024-06-20 17:06:19,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 370 transitions, 4693 flow [2024-06-20 17:06:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:06:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:06:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:06:19,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:06:19,662 INFO L175 Difference]: Start difference. First operand has 279 places, 333 transitions, 3709 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:06:19,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 370 transitions, 4693 flow [2024-06-20 17:06:20,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 370 transitions, 4449 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-20 17:06:20,235 INFO L231 Difference]: Finished difference. Result has 279 places, 333 transitions, 3669 flow [2024-06-20 17:06:20,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3669, PETRI_PLACES=279, PETRI_TRANSITIONS=333} [2024-06-20 17:06:20,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-20 17:06:20,236 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 333 transitions, 3669 flow [2024-06-20 17:06:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:20,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:20,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:20,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:06:20,237 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)] === [2024-06-20 17:06:20,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash 754964672, now seen corresponding path program 11 times [2024-06-20 17:06:20,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:20,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553444161] [2024-06-20 17:06:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:20,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:23,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553444161] [2024-06-20 17:06:23,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553444161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:23,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:23,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:23,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549783718] [2024-06-20 17:06:23,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:23,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:23,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:23,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:23,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:23,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 333 transitions, 3669 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:23,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:23,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:23,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:24,640 INFO L124 PetriNetUnfolderBase]: 2446/4061 cut-off events. [2024-06-20 17:06:24,641 INFO L125 PetriNetUnfolderBase]: For 272688/272704 co-relation queries the response was YES. [2024-06-20 17:06:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26778 conditions, 4061 events. 2446/4061 cut-off events. For 272688/272704 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24766 event pairs, 532 based on Foata normal form. 16/4073 useless extension candidates. Maximal degree in co-relation 26655. Up to 3706 conditions per place. [2024-06-20 17:06:24,684 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-20 17:06:24,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 356 transitions, 4441 flow [2024-06-20 17:06:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:06:24,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:06:24,685 INFO L175 Difference]: Start difference. First operand has 279 places, 333 transitions, 3669 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:06:24,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 356 transitions, 4441 flow [2024-06-20 17:06:25,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 356 transitions, 4191 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-20 17:06:25,231 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3547 flow [2024-06-20 17:06:25,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-20 17:06:25,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 17:06:25,231 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3547 flow [2024-06-20 17:06:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:25,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:25,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:25,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:06:25,232 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)] === [2024-06-20 17:06:25,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash 755380382, now seen corresponding path program 12 times [2024-06-20 17:06:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:25,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157821609] [2024-06-20 17:06:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:25,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:27,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157821609] [2024-06-20 17:06:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157821609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:27,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530118666] [2024-06-20 17:06:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:27,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:27,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3547 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:27,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:27,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:27,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:29,111 INFO L124 PetriNetUnfolderBase]: 2440/4055 cut-off events. [2024-06-20 17:06:29,111 INFO L125 PetriNetUnfolderBase]: For 253541/253557 co-relation queries the response was YES. [2024-06-20 17:06:29,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26254 conditions, 4055 events. 2440/4055 cut-off events. For 253541/253557 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24740 event pairs, 517 based on Foata normal form. 16/4067 useless extension candidates. Maximal degree in co-relation 26133. Up to 3584 conditions per place. [2024-06-20 17:06:29,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 96 changer transitions 0/355 dead transitions. [2024-06-20 17:06:29,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 355 transitions, 4311 flow [2024-06-20 17:06:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:06:29,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:06:29,160 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3547 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:06:29,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 355 transitions, 4311 flow [2024-06-20 17:06:29,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 355 transitions, 4165 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:06:29,718 INFO L231 Difference]: Finished difference. Result has 273 places, 333 transitions, 3603 flow [2024-06-20 17:06:29,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=273, PETRI_TRANSITIONS=333} [2024-06-20 17:06:29,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-20 17:06:29,719 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 333 transitions, 3603 flow [2024-06-20 17:06:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:29,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:29,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:06:29,719 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)] === [2024-06-20 17:06:29,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 755201636, now seen corresponding path program 12 times [2024-06-20 17:06:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542693642] [2024-06-20 17:06:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542693642] [2024-06-20 17:06:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542693642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:32,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:32,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383591156] [2024-06-20 17:06:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:32,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:32,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:32,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 333 transitions, 3603 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:32,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:32,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:32,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:33,811 INFO L124 PetriNetUnfolderBase]: 2437/4049 cut-off events. [2024-06-20 17:06:33,811 INFO L125 PetriNetUnfolderBase]: For 242578/242594 co-relation queries the response was YES. [2024-06-20 17:06:33,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26152 conditions, 4049 events. 2437/4049 cut-off events. For 242578/242594 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24622 event pairs, 531 based on Foata normal form. 15/4060 useless extension candidates. Maximal degree in co-relation 26032. Up to 3638 conditions per place. [2024-06-20 17:06:33,856 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 87 changer transitions 0/359 dead transitions. [2024-06-20 17:06:33,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 359 transitions, 4391 flow [2024-06-20 17:06:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:06:33,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:06:33,859 INFO L175 Difference]: Start difference. First operand has 273 places, 333 transitions, 3603 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:06:33,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 359 transitions, 4391 flow [2024-06-20 17:06:34,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 359 transitions, 4175 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:06:34,364 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3575 flow [2024-06-20 17:06:34,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3575, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-20 17:06:34,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 17:06:34,365 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3575 flow [2024-06-20 17:06:34,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:34,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:34,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:34,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:06:34,365 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)] === [2024-06-20 17:06:34,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash 578079230, now seen corresponding path program 2 times [2024-06-20 17:06:34,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:34,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898247645] [2024-06-20 17:06:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:37,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898247645] [2024-06-20 17:06:37,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898247645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:37,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:37,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349458068] [2024-06-20 17:06:37,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:37,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:37,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3575 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:37,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:37,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:37,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:38,864 INFO L124 PetriNetUnfolderBase]: 2329/3899 cut-off events. [2024-06-20 17:06:38,864 INFO L125 PetriNetUnfolderBase]: For 266608/266621 co-relation queries the response was YES. [2024-06-20 17:06:38,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 3899 events. 2329/3899 cut-off events. For 266608/266621 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24011 event pairs, 493 based on Foata normal form. 21/3880 useless extension candidates. Maximal degree in co-relation 25390. Up to 3333 conditions per place. [2024-06-20 17:06:38,905 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 261 selfloop transitions, 45 changer transitions 0/359 dead transitions. [2024-06-20 17:06:38,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 359 transitions, 4295 flow [2024-06-20 17:06:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:06:38,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 17:06:38,907 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3575 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:06:38,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 359 transitions, 4295 flow [2024-06-20 17:06:39,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 359 transitions, 4113 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:06:39,346 INFO L231 Difference]: Finished difference. Result has 274 places, 334 transitions, 3513 flow [2024-06-20 17:06:39,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3513, PETRI_PLACES=274, PETRI_TRANSITIONS=334} [2024-06-20 17:06:39,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 17:06:39,347 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 334 transitions, 3513 flow [2024-06-20 17:06:39,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:39,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:39,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:06:39,347 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)] === [2024-06-20 17:06:39,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 977576540, now seen corresponding path program 3 times [2024-06-20 17:06:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951127591] [2024-06-20 17:06:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:42,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951127591] [2024-06-20 17:06:42,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951127591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:42,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:42,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:06:42,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77611477] [2024-06-20 17:06:42,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:42,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:06:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:06:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:06:43,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:43,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 334 transitions, 3513 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:43,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:43,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:43,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:44,355 INFO L124 PetriNetUnfolderBase]: 2368/3956 cut-off events. [2024-06-20 17:06:44,356 INFO L125 PetriNetUnfolderBase]: For 261100/261122 co-relation queries the response was YES. [2024-06-20 17:06:44,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25754 conditions, 3956 events. 2368/3956 cut-off events. For 261100/261122 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24365 event pairs, 501 based on Foata normal form. 33/3942 useless extension candidates. Maximal degree in co-relation 25634. Up to 3423 conditions per place. [2024-06-20 17:06:44,396 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 251 selfloop transitions, 50 changer transitions 0/354 dead transitions. [2024-06-20 17:06:44,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 354 transitions, 4207 flow [2024-06-20 17:06:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:06:44,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:06:44,398 INFO L175 Difference]: Start difference. First operand has 274 places, 334 transitions, 3513 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:06:44,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 354 transitions, 4207 flow [2024-06-20 17:06:44,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 354 transitions, 4113 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:44,840 INFO L231 Difference]: Finished difference. Result has 276 places, 335 transitions, 3547 flow [2024-06-20 17:06:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=276, PETRI_TRANSITIONS=335} [2024-06-20 17:06:44,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-20 17:06:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 335 transitions, 3547 flow [2024-06-20 17:06:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:44,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:44,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:06:44,842 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)] === [2024-06-20 17:06:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 991861340, now seen corresponding path program 4 times [2024-06-20 17:06:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111958320] [2024-06-20 17:06:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:48,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111958320] [2024-06-20 17:06:48,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111958320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:48,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:48,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:48,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137449165] [2024-06-20 17:06:48,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:48,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:48,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:06:48,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 335 transitions, 3547 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) [2024-06-20 17:06:48,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:48,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:06:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:49,628 INFO L124 PetriNetUnfolderBase]: 2370/3958 cut-off events. [2024-06-20 17:06:49,629 INFO L125 PetriNetUnfolderBase]: For 243056/243080 co-relation queries the response was YES. [2024-06-20 17:06:49,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25437 conditions, 3958 events. 2370/3958 cut-off events. For 243056/243080 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24349 event pairs, 497 based on Foata normal form. 29/3936 useless extension candidates. Maximal degree in co-relation 25316. Up to 3305 conditions per place. [2024-06-20 17:06:49,668 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 54 changer transitions 0/357 dead transitions. [2024-06-20 17:06:49,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 357 transitions, 4265 flow [2024-06-20 17:06:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:06:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:06:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:06:49,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:06:49,669 INFO L175 Difference]: Start difference. First operand has 276 places, 335 transitions, 3547 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:06:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 357 transitions, 4265 flow [2024-06-20 17:06:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 357 transitions, 4161 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:50,096 INFO L231 Difference]: Finished difference. Result has 278 places, 336 transitions, 3577 flow [2024-06-20 17:06:50,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3577, PETRI_PLACES=278, PETRI_TRANSITIONS=336} [2024-06-20 17:06:50,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 17:06:50,097 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 336 transitions, 3577 flow [2024-06-20 17:06:50,097 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) [2024-06-20 17:06:50,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:50,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:50,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:06:50,097 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)] === [2024-06-20 17:06:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1246081270, now seen corresponding path program 1 times [2024-06-20 17:06:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271610383] [2024-06-20 17:06:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271610383] [2024-06-20 17:06:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271610383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:52,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661791794] [2024-06-20 17:06:52,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:52,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:52,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 336 transitions, 3577 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:52,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:52,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:52,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:53,919 INFO L124 PetriNetUnfolderBase]: 2535/4203 cut-off events. [2024-06-20 17:06:53,919 INFO L125 PetriNetUnfolderBase]: For 238621/238623 co-relation queries the response was YES. [2024-06-20 17:06:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26770 conditions, 4203 events. 2535/4203 cut-off events. For 238621/238623 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25722 event pairs, 516 based on Foata normal form. 2/4203 useless extension candidates. Maximal degree in co-relation 26648. Up to 3886 conditions per place. [2024-06-20 17:06:53,970 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 32 changer transitions 0/368 dead transitions. [2024-06-20 17:06:53,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 368 transitions, 4605 flow [2024-06-20 17:06:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:06:53,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:06:53,972 INFO L175 Difference]: Start difference. First operand has 278 places, 336 transitions, 3577 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:06:53,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 368 transitions, 4605 flow [2024-06-20 17:06:54,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 368 transitions, 4487 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:06:54,501 INFO L231 Difference]: Finished difference. Result has 281 places, 340 transitions, 3624 flow [2024-06-20 17:06:54,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3624, PETRI_PLACES=281, PETRI_TRANSITIONS=340} [2024-06-20 17:06:54,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-20 17:06:54,502 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 340 transitions, 3624 flow [2024-06-20 17:06:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:54,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:06:54,502 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)] === [2024-06-20 17:06:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -148301444, now seen corresponding path program 2 times [2024-06-20 17:06:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545038021] [2024-06-20 17:06:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:06:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:06:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:06:57,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545038021] [2024-06-20 17:06:57,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545038021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:06:57,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:06:57,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:06:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347345683] [2024-06-20 17:06:57,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:06:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:06:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:06:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:06:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:06:57,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:06:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 340 transitions, 3624 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:06:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:06:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:06:58,912 INFO L124 PetriNetUnfolderBase]: 2543/4215 cut-off events. [2024-06-20 17:06:58,912 INFO L125 PetriNetUnfolderBase]: For 244527/244529 co-relation queries the response was YES. [2024-06-20 17:06:58,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26827 conditions, 4215 events. 2543/4215 cut-off events. For 244527/244529 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25728 event pairs, 554 based on Foata normal form. 2/4215 useless extension candidates. Maximal degree in co-relation 26704. Up to 3935 conditions per place. [2024-06-20 17:06:58,967 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 29 changer transitions 0/364 dead transitions. [2024-06-20 17:06:58,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 364 transitions, 4452 flow [2024-06-20 17:06:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:06:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:06:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:06:58,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:06:58,968 INFO L175 Difference]: Start difference. First operand has 281 places, 340 transitions, 3624 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:06:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 364 transitions, 4452 flow [2024-06-20 17:06:59,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 364 transitions, 4346 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 17:06:59,487 INFO L231 Difference]: Finished difference. Result has 285 places, 342 transitions, 3635 flow [2024-06-20 17:06:59,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3635, PETRI_PLACES=285, PETRI_TRANSITIONS=342} [2024-06-20 17:06:59,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 17:06:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 342 transitions, 3635 flow [2024-06-20 17:06:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:06:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:06:59,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:06:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:06:59,488 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)] === [2024-06-20 17:06:59,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:06:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash 214510566, now seen corresponding path program 3 times [2024-06-20 17:06:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:06:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568977863] [2024-06-20 17:06:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:06:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:06:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:01,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:01,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568977863] [2024-06-20 17:07:01,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568977863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:01,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:01,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719185832] [2024-06-20 17:07:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:01,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:01,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:01,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:01,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 342 transitions, 3635 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:01,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:01,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:01,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:03,316 INFO L124 PetriNetUnfolderBase]: 2551/4227 cut-off events. [2024-06-20 17:07:03,316 INFO L125 PetriNetUnfolderBase]: For 251443/251445 co-relation queries the response was YES. [2024-06-20 17:07:03,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26940 conditions, 4227 events. 2551/4227 cut-off events. For 251443/251445 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25827 event pairs, 554 based on Foata normal form. 2/4227 useless extension candidates. Maximal degree in co-relation 26815. Up to 3964 conditions per place. [2024-06-20 17:07:03,368 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-20 17:07:03,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 362 transitions, 4435 flow [2024-06-20 17:07:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:07:03,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 17:07:03,370 INFO L175 Difference]: Start difference. First operand has 285 places, 342 transitions, 3635 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:07:03,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 362 transitions, 4435 flow [2024-06-20 17:07:03,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 362 transitions, 4354 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:03,909 INFO L231 Difference]: Finished difference. Result has 287 places, 344 transitions, 3643 flow [2024-06-20 17:07:03,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3643, PETRI_PLACES=287, PETRI_TRANSITIONS=344} [2024-06-20 17:07:03,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 17:07:03,909 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 344 transitions, 3643 flow [2024-06-20 17:07:03,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:03,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:03,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:07:03,910 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)] === [2024-06-20 17:07:03,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1364414098, now seen corresponding path program 1 times [2024-06-20 17:07:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890517262] [2024-06-20 17:07:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:07,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890517262] [2024-06-20 17:07:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890517262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:07,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:07,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775497956] [2024-06-20 17:07:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:07,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:07,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:07,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 344 transitions, 3643 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:07,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:07,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:07,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:09,152 INFO L124 PetriNetUnfolderBase]: 2559/4235 cut-off events. [2024-06-20 17:07:09,152 INFO L125 PetriNetUnfolderBase]: For 258357/258359 co-relation queries the response was YES. [2024-06-20 17:07:09,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27078 conditions, 4235 events. 2559/4235 cut-off events. For 258357/258359 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25867 event pairs, 532 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 26952. Up to 3953 conditions per place. [2024-06-20 17:07:09,203 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 28 changer transitions 0/367 dead transitions. [2024-06-20 17:07:09,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 367 transitions, 4463 flow [2024-06-20 17:07:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:07:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:07:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:07:09,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:07:09,205 INFO L175 Difference]: Start difference. First operand has 287 places, 344 transitions, 3643 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:07:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 367 transitions, 4463 flow [2024-06-20 17:07:09,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 367 transitions, 4394 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:09,823 INFO L231 Difference]: Finished difference. Result has 289 places, 346 transitions, 3681 flow [2024-06-20 17:07:09,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3681, PETRI_PLACES=289, PETRI_TRANSITIONS=346} [2024-06-20 17:07:09,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 17:07:09,824 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 346 transitions, 3681 flow [2024-06-20 17:07:09,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:09,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:09,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:07:09,825 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)] === [2024-06-20 17:07:09,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash 755210564, now seen corresponding path program 4 times [2024-06-20 17:07:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318292910] [2024-06-20 17:07:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:12,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:12,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318292910] [2024-06-20 17:07:12,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318292910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:12,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:12,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:07:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484941087] [2024-06-20 17:07:12,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:07:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:07:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:07:12,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:12,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 346 transitions, 3681 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:12,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:12,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:13,792 INFO L124 PetriNetUnfolderBase]: 2554/4232 cut-off events. [2024-06-20 17:07:13,792 INFO L125 PetriNetUnfolderBase]: For 260388/260390 co-relation queries the response was YES. [2024-06-20 17:07:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27048 conditions, 4232 events. 2554/4232 cut-off events. For 260388/260390 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25907 event pairs, 515 based on Foata normal form. 2/4232 useless extension candidates. Maximal degree in co-relation 26921. Up to 3927 conditions per place. [2024-06-20 17:07:13,843 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 30 changer transitions 0/371 dead transitions. [2024-06-20 17:07:13,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 371 transitions, 4483 flow [2024-06-20 17:07:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:07:13,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:07:13,844 INFO L175 Difference]: Start difference. First operand has 289 places, 346 transitions, 3681 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:07:13,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 371 transitions, 4483 flow [2024-06-20 17:07:14,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 371 transitions, 4368 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:14,354 INFO L231 Difference]: Finished difference. Result has 290 places, 346 transitions, 3637 flow [2024-06-20 17:07:14,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3637, PETRI_PLACES=290, PETRI_TRANSITIONS=346} [2024-06-20 17:07:14,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 17:07:14,355 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 3637 flow [2024-06-20 17:07:14,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:14,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:14,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:07:14,355 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)] === [2024-06-20 17:07:14,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash 983527052, now seen corresponding path program 2 times [2024-06-20 17:07:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:14,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288703113] [2024-06-20 17:07:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:14,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:17,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:17,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288703113] [2024-06-20 17:07:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288703113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:17,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:17,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160241974] [2024-06-20 17:07:17,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:17,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:17,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 3637 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:17,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:17,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:18,879 INFO L124 PetriNetUnfolderBase]: 2562/4245 cut-off events. [2024-06-20 17:07:18,880 INFO L125 PetriNetUnfolderBase]: For 267452/267457 co-relation queries the response was YES. [2024-06-20 17:07:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27173 conditions, 4245 events. 2562/4245 cut-off events. For 267452/267457 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25947 event pairs, 536 based on Foata normal form. 4/4246 useless extension candidates. Maximal degree in co-relation 27045. Up to 3958 conditions per place. [2024-06-20 17:07:18,929 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 331 selfloop transitions, 27 changer transitions 0/363 dead transitions. [2024-06-20 17:07:18,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 363 transitions, 4437 flow [2024-06-20 17:07:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:07:18,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:07:18,931 INFO L175 Difference]: Start difference. First operand has 290 places, 346 transitions, 3637 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:07:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 363 transitions, 4437 flow [2024-06-20 17:07:19,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 363 transitions, 4368 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:07:19,496 INFO L231 Difference]: Finished difference. Result has 291 places, 348 transitions, 3677 flow [2024-06-20 17:07:19,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3677, PETRI_PLACES=291, PETRI_TRANSITIONS=348} [2024-06-20 17:07:19,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-20 17:07:19,511 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 348 transitions, 3677 flow [2024-06-20 17:07:19,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:19,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:19,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:07:19,512 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)] === [2024-06-20 17:07:19,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 755395262, now seen corresponding path program 3 times [2024-06-20 17:07:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:19,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178673947] [2024-06-20 17:07:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:19,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:22,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:22,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178673947] [2024-06-20 17:07:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178673947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:22,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055426777] [2024-06-20 17:07:22,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:22,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:22,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:22,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 348 transitions, 3677 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:22,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:22,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:22,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:24,221 INFO L124 PetriNetUnfolderBase]: 2570/4252 cut-off events. [2024-06-20 17:07:24,221 INFO L125 PetriNetUnfolderBase]: For 268172/268174 co-relation queries the response was YES. [2024-06-20 17:07:24,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27349 conditions, 4252 events. 2570/4252 cut-off events. For 268172/268174 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25910 event pairs, 533 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 27220. Up to 3964 conditions per place. [2024-06-20 17:07:24,274 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 335 selfloop transitions, 30 changer transitions 0/370 dead transitions. [2024-06-20 17:07:24,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 370 transitions, 4509 flow [2024-06-20 17:07:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:07:24,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 17:07:24,276 INFO L175 Difference]: Start difference. First operand has 291 places, 348 transitions, 3677 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:07:24,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 370 transitions, 4509 flow [2024-06-20 17:07:24,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 370 transitions, 4416 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:24,903 INFO L231 Difference]: Finished difference. Result has 293 places, 350 transitions, 3706 flow [2024-06-20 17:07:24,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3706, PETRI_PLACES=293, PETRI_TRANSITIONS=350} [2024-06-20 17:07:24,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-20 17:07:24,904 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 350 transitions, 3706 flow [2024-06-20 17:07:24,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:24,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:24,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:24,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:07:24,905 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)] === [2024-06-20 17:07:24,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 991867292, now seen corresponding path program 4 times [2024-06-20 17:07:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674916013] [2024-06-20 17:07:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:28,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674916013] [2024-06-20 17:07:28,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674916013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:28,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:28,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348885347] [2024-06-20 17:07:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:28,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:28,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 350 transitions, 3706 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:28,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:29,300 INFO L124 PetriNetUnfolderBase]: 2565/4250 cut-off events. [2024-06-20 17:07:29,301 INFO L125 PetriNetUnfolderBase]: For 270342/270347 co-relation queries the response was YES. [2024-06-20 17:07:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27270 conditions, 4250 events. 2565/4250 cut-off events. For 270342/270347 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26004 event pairs, 529 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 27140. Up to 3937 conditions per place. [2024-06-20 17:07:29,354 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 328 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-20 17:07:29,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 367 transitions, 4522 flow [2024-06-20 17:07:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:07:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:07:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:07:29,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:07:29,356 INFO L175 Difference]: Start difference. First operand has 293 places, 350 transitions, 3706 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:07:29,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 367 transitions, 4522 flow [2024-06-20 17:07:29,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 367 transitions, 4416 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:29,904 INFO L231 Difference]: Finished difference. Result has 295 places, 352 transitions, 3731 flow [2024-06-20 17:07:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3731, PETRI_PLACES=295, PETRI_TRANSITIONS=352} [2024-06-20 17:07:29,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 17:07:29,905 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 352 transitions, 3731 flow [2024-06-20 17:07:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:07:29,906 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)] === [2024-06-20 17:07:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1549228995, now seen corresponding path program 1 times [2024-06-20 17:07:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297407301] [2024-06-20 17:07:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:33,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297407301] [2024-06-20 17:07:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297407301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:33,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:33,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:33,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952939021] [2024-06-20 17:07:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:33,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:33,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 352 transitions, 3731 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:33,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:35,201 INFO L124 PetriNetUnfolderBase]: 2641/4379 cut-off events. [2024-06-20 17:07:35,202 INFO L125 PetriNetUnfolderBase]: For 286386/286392 co-relation queries the response was YES. [2024-06-20 17:07:35,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27858 conditions, 4379 events. 2641/4379 cut-off events. For 286386/286392 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26784 event pairs, 457 based on Foata normal form. 14/4391 useless extension candidates. Maximal degree in co-relation 27727. Up to 3762 conditions per place. [2024-06-20 17:07:35,255 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 59 changer transitions 0/406 dead transitions. [2024-06-20 17:07:35,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 406 transitions, 4910 flow [2024-06-20 17:07:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:07:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:07:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 17:07:35,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-20 17:07:35,258 INFO L175 Difference]: Start difference. First operand has 295 places, 352 transitions, 3731 flow. Second operand 11 states and 188 transitions. [2024-06-20 17:07:35,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 406 transitions, 4910 flow [2024-06-20 17:07:35,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 406 transitions, 4799 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:35,858 INFO L231 Difference]: Finished difference. Result has 303 places, 357 transitions, 3831 flow [2024-06-20 17:07:35,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3831, PETRI_PLACES=303, PETRI_TRANSITIONS=357} [2024-06-20 17:07:35,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-20 17:07:35,859 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 357 transitions, 3831 flow [2024-06-20 17:07:35,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:35,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:35,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:35,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:07:35,859 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)] === [2024-06-20 17:07:35,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1541819685, now seen corresponding path program 2 times [2024-06-20 17:07:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619307278] [2024-06-20 17:07:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:39,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619307278] [2024-06-20 17:07:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619307278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:39,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:39,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646209365] [2024-06-20 17:07:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:39,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:39,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 357 transitions, 3831 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:39,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:39,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:39,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:40,715 INFO L124 PetriNetUnfolderBase]: 2733/4523 cut-off events. [2024-06-20 17:07:40,716 INFO L125 PetriNetUnfolderBase]: For 295297/295303 co-relation queries the response was YES. [2024-06-20 17:07:40,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29036 conditions, 4523 events. 2733/4523 cut-off events. For 295297/295303 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27856 event pairs, 557 based on Foata normal form. 14/4535 useless extension candidates. Maximal degree in co-relation 28902. Up to 4048 conditions per place. [2024-06-20 17:07:40,770 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 64 changer transitions 0/415 dead transitions. [2024-06-20 17:07:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 415 transitions, 4979 flow [2024-06-20 17:07:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:07:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:07:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-20 17:07:40,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:07:40,772 INFO L175 Difference]: Start difference. First operand has 303 places, 357 transitions, 3831 flow. Second operand 12 states and 195 transitions. [2024-06-20 17:07:40,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 415 transitions, 4979 flow [2024-06-20 17:07:41,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 415 transitions, 4803 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 17:07:41,514 INFO L231 Difference]: Finished difference. Result has 308 places, 370 transitions, 3975 flow [2024-06-20 17:07:41,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3671, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3975, PETRI_PLACES=308, PETRI_TRANSITIONS=370} [2024-06-20 17:07:41,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 17:07:41,519 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 370 transitions, 3975 flow [2024-06-20 17:07:41,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:41,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:41,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:41,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:07:41,519 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)] === [2024-06-20 17:07:41,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1869069983, now seen corresponding path program 1 times [2024-06-20 17:07:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:41,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209590426] [2024-06-20 17:07:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:45,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209590426] [2024-06-20 17:07:45,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209590426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:45,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:45,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:45,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353139261] [2024-06-20 17:07:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:45,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:45,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:45,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:45,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 370 transitions, 3975 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:45,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:45,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:45,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:47,023 INFO L124 PetriNetUnfolderBase]: 2746/4547 cut-off events. [2024-06-20 17:07:47,023 INFO L125 PetriNetUnfolderBase]: For 285995/286001 co-relation queries the response was YES. [2024-06-20 17:07:47,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29169 conditions, 4547 events. 2746/4547 cut-off events. For 285995/286001 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28085 event pairs, 579 based on Foata normal form. 7/4552 useless extension candidates. Maximal degree in co-relation 29035. Up to 4124 conditions per place. [2024-06-20 17:07:47,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 63 changer transitions 0/415 dead transitions. [2024-06-20 17:07:47,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 415 transitions, 5179 flow [2024-06-20 17:07:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:07:47,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:07:47,085 INFO L175 Difference]: Start difference. First operand has 308 places, 370 transitions, 3975 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:07:47,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 415 transitions, 5179 flow [2024-06-20 17:07:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 415 transitions, 5045 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:07:47,801 INFO L231 Difference]: Finished difference. Result has 310 places, 376 transitions, 4099 flow [2024-06-20 17:07:47,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4099, PETRI_PLACES=310, PETRI_TRANSITIONS=376} [2024-06-20 17:07:47,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-20 17:07:47,801 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 376 transitions, 4099 flow [2024-06-20 17:07:47,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:47,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:47,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:47,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:07:47,802 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)] === [2024-06-20 17:07:47,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2098097735, now seen corresponding path program 2 times [2024-06-20 17:07:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:47,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661977312] [2024-06-20 17:07:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:51,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:51,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661977312] [2024-06-20 17:07:51,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661977312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:51,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:51,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343365001] [2024-06-20 17:07:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:51,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:51,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:51,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 376 transitions, 4099 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:51,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:51,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:53,485 INFO L124 PetriNetUnfolderBase]: 2761/4574 cut-off events. [2024-06-20 17:07:53,485 INFO L125 PetriNetUnfolderBase]: For 295205/295211 co-relation queries the response was YES. [2024-06-20 17:07:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29732 conditions, 4574 events. 2761/4574 cut-off events. For 295205/295211 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28332 event pairs, 581 based on Foata normal form. 7/4579 useless extension candidates. Maximal degree in co-relation 29597. Up to 4164 conditions per place. [2024-06-20 17:07:53,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 64 changer transitions 0/419 dead transitions. [2024-06-20 17:07:53,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 419 transitions, 5163 flow [2024-06-20 17:07:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:07:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:07:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:07:53,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:07:53,548 INFO L175 Difference]: Start difference. First operand has 310 places, 376 transitions, 4099 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:07:53,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 419 transitions, 5163 flow [2024-06-20 17:07:54,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 419 transitions, 4984 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:07:54,171 INFO L231 Difference]: Finished difference. Result has 314 places, 385 transitions, 4197 flow [2024-06-20 17:07:54,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4197, PETRI_PLACES=314, PETRI_TRANSITIONS=385} [2024-06-20 17:07:54,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 17:07:54,172 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 385 transitions, 4197 flow [2024-06-20 17:07:54,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:54,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:07:54,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:07:54,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:07:54,173 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)] === [2024-06-20 17:07:54,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:07:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1297336141, now seen corresponding path program 1 times [2024-06-20 17:07:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:07:54,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058226953] [2024-06-20 17:07:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:07:54,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:07:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:07:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:07:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:07:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058226953] [2024-06-20 17:07:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058226953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:07:57,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:07:57,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:07:57,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108515825] [2024-06-20 17:07:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:07:57,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:07:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:07:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:07:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:07:57,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:07:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 385 transitions, 4197 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:07:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:07:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:07:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:07:59,559 INFO L124 PetriNetUnfolderBase]: 2787/4602 cut-off events. [2024-06-20 17:07:59,559 INFO L125 PetriNetUnfolderBase]: For 312128/312134 co-relation queries the response was YES. [2024-06-20 17:07:59,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30317 conditions, 4602 events. 2787/4602 cut-off events. For 312128/312134 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28378 event pairs, 566 based on Foata normal form. 8/4608 useless extension candidates. Maximal degree in co-relation 30180. Up to 4128 conditions per place. [2024-06-20 17:07:59,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 80 changer transitions 0/432 dead transitions. [2024-06-20 17:07:59,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 432 transitions, 5435 flow [2024-06-20 17:07:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:07:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:07:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 17:07:59,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-20 17:07:59,620 INFO L175 Difference]: Start difference. First operand has 314 places, 385 transitions, 4197 flow. Second operand 11 states and 185 transitions. [2024-06-20 17:07:59,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 432 transitions, 5435 flow [2024-06-20 17:08:00,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 432 transitions, 5276 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:00,341 INFO L231 Difference]: Finished difference. Result has 319 places, 391 transitions, 4327 flow [2024-06-20 17:08:00,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4327, PETRI_PLACES=319, PETRI_TRANSITIONS=391} [2024-06-20 17:08:00,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 17:08:00,341 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 391 transitions, 4327 flow [2024-06-20 17:08:00,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:00,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:00,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:08:00,342 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)] === [2024-06-20 17:08:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1861209615, now seen corresponding path program 2 times [2024-06-20 17:08:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066569138] [2024-06-20 17:08:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:00,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:03,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066569138] [2024-06-20 17:08:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066569138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277946268] [2024-06-20 17:08:03,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:03,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:03,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:03,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:03,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 391 transitions, 4327 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:03,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:03,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:03,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:05,745 INFO L124 PetriNetUnfolderBase]: 2823/4660 cut-off events. [2024-06-20 17:08:05,746 INFO L125 PetriNetUnfolderBase]: For 328906/328912 co-relation queries the response was YES. [2024-06-20 17:08:05,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31380 conditions, 4660 events. 2823/4660 cut-off events. For 328906/328912 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28818 event pairs, 566 based on Foata normal form. 8/4666 useless extension candidates. Maximal degree in co-relation 31242. Up to 4161 conditions per place. [2024-06-20 17:08:05,811 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 93 changer transitions 0/450 dead transitions. [2024-06-20 17:08:05,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 450 transitions, 5855 flow [2024-06-20 17:08:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:08:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:08:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-06-20 17:08:05,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:08:05,814 INFO L175 Difference]: Start difference. First operand has 319 places, 391 transitions, 4327 flow. Second operand 14 states and 224 transitions. [2024-06-20 17:08:05,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 450 transitions, 5855 flow [2024-06-20 17:08:06,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 450 transitions, 5670 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:06,753 INFO L231 Difference]: Finished difference. Result has 327 places, 403 transitions, 4554 flow [2024-06-20 17:08:06,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4554, PETRI_PLACES=327, PETRI_TRANSITIONS=403} [2024-06-20 17:08:06,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 17:08:06,754 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 403 transitions, 4554 flow [2024-06-20 17:08:06,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:06,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:06,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:06,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:08:06,755 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)] === [2024-06-20 17:08:06,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1861446951, now seen corresponding path program 3 times [2024-06-20 17:08:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504158894] [2024-06-20 17:08:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504158894] [2024-06-20 17:08:10,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504158894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401581250] [2024-06-20 17:08:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:10,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:10,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:10,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:10,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 403 transitions, 4554 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:10,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:10,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:10,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:12,576 INFO L124 PetriNetUnfolderBase]: 2828/4665 cut-off events. [2024-06-20 17:08:12,576 INFO L125 PetriNetUnfolderBase]: For 332703/332709 co-relation queries the response was YES. [2024-06-20 17:08:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31633 conditions, 4665 events. 2828/4665 cut-off events. For 332703/332709 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28881 event pairs, 583 based on Foata normal form. 7/4670 useless extension candidates. Maximal degree in co-relation 31492. Up to 4250 conditions per place. [2024-06-20 17:08:12,638 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 74 changer transitions 0/443 dead transitions. [2024-06-20 17:08:12,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 443 transitions, 5584 flow [2024-06-20 17:08:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:08:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:08:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-20 17:08:12,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-20 17:08:12,640 INFO L175 Difference]: Start difference. First operand has 327 places, 403 transitions, 4554 flow. Second operand 12 states and 191 transitions. [2024-06-20 17:08:12,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 443 transitions, 5584 flow [2024-06-20 17:08:13,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 443 transitions, 5394 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 17:08:13,643 INFO L231 Difference]: Finished difference. Result has 330 places, 406 transitions, 4573 flow [2024-06-20 17:08:13,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4573, PETRI_PLACES=330, PETRI_TRANSITIONS=406} [2024-06-20 17:08:13,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 17:08:13,644 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 406 transitions, 4573 flow [2024-06-20 17:08:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:13,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:13,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:08:13,644 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)] === [2024-06-20 17:08:13,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1862636057, now seen corresponding path program 3 times [2024-06-20 17:08:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:13,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893529206] [2024-06-20 17:08:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:16,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893529206] [2024-06-20 17:08:16,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893529206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:16,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:16,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:16,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384525904] [2024-06-20 17:08:16,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:16,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:16,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:16,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:16,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 406 transitions, 4573 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:19,052 INFO L124 PetriNetUnfolderBase]: 2822/4657 cut-off events. [2024-06-20 17:08:19,052 INFO L125 PetriNetUnfolderBase]: For 336936/336942 co-relation queries the response was YES. [2024-06-20 17:08:19,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31404 conditions, 4657 events. 2822/4657 cut-off events. For 336936/336942 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28822 event pairs, 566 based on Foata normal form. 8/4663 useless extension candidates. Maximal degree in co-relation 31262. Up to 4163 conditions per place. [2024-06-20 17:08:19,113 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 91 changer transitions 0/453 dead transitions. [2024-06-20 17:08:19,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 453 transitions, 5755 flow [2024-06-20 17:08:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:08:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:08:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 226 transitions. [2024-06-20 17:08:19,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-20 17:08:19,115 INFO L175 Difference]: Start difference. First operand has 330 places, 406 transitions, 4573 flow. Second operand 14 states and 226 transitions. [2024-06-20 17:08:19,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 453 transitions, 5755 flow [2024-06-20 17:08:20,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 453 transitions, 5514 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-20 17:08:20,063 INFO L231 Difference]: Finished difference. Result has 333 places, 406 transitions, 4521 flow [2024-06-20 17:08:20,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4521, PETRI_PLACES=333, PETRI_TRANSITIONS=406} [2024-06-20 17:08:20,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 17:08:20,064 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 406 transitions, 4521 flow [2024-06-20 17:08:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:20,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:20,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:20,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:08:20,065 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)] === [2024-06-20 17:08:20,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash -979959077, now seen corresponding path program 3 times [2024-06-20 17:08:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:20,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313946356] [2024-06-20 17:08:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:20,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:23,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313946356] [2024-06-20 17:08:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313946356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567902089] [2024-06-20 17:08:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:23,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:23,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 406 transitions, 4521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:23,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:23,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:23,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:25,443 INFO L124 PetriNetUnfolderBase]: 2858/4710 cut-off events. [2024-06-20 17:08:25,443 INFO L125 PetriNetUnfolderBase]: For 365364/365366 co-relation queries the response was YES. [2024-06-20 17:08:25,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31830 conditions, 4710 events. 2858/4710 cut-off events. For 365364/365366 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29115 event pairs, 571 based on Foata normal form. 8/4716 useless extension candidates. Maximal degree in co-relation 31688. Up to 4230 conditions per place. [2024-06-20 17:08:25,502 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 61 changer transitions 0/445 dead transitions. [2024-06-20 17:08:25,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 5580 flow [2024-06-20 17:08:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:08:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:08:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-20 17:08:25,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-20 17:08:25,503 INFO L175 Difference]: Start difference. First operand has 333 places, 406 transitions, 4521 flow. Second operand 12 states and 190 transitions. [2024-06-20 17:08:25,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 5580 flow [2024-06-20 17:08:26,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 445 transitions, 5359 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-20 17:08:26,508 INFO L231 Difference]: Finished difference. Result has 332 places, 409 transitions, 4486 flow [2024-06-20 17:08:26,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4486, PETRI_PLACES=332, PETRI_TRANSITIONS=409} [2024-06-20 17:08:26,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 17:08:26,509 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 409 transitions, 4486 flow [2024-06-20 17:08:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:26,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:26,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:08:26,510 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)] === [2024-06-20 17:08:26,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2113335135, now seen corresponding path program 4 times [2024-06-20 17:08:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068553710] [2024-06-20 17:08:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:30,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:30,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068553710] [2024-06-20 17:08:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068553710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:30,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:30,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:30,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703873134] [2024-06-20 17:08:30,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:30,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:30,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:30,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 409 transitions, 4486 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:30,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:30,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:30,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:32,178 INFO L124 PetriNetUnfolderBase]: 2879/4740 cut-off events. [2024-06-20 17:08:32,178 INFO L125 PetriNetUnfolderBase]: For 358550/358552 co-relation queries the response was YES. [2024-06-20 17:08:32,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32350 conditions, 4740 events. 2879/4740 cut-off events. For 358550/358552 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29323 event pairs, 614 based on Foata normal form. 1/4736 useless extension candidates. Maximal degree in co-relation 32206. Up to 4007 conditions per place. [2024-06-20 17:08:32,244 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 154 changer transitions 0/458 dead transitions. [2024-06-20 17:08:32,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 458 transitions, 6420 flow [2024-06-20 17:08:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:08:32,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:08:32,246 INFO L175 Difference]: Start difference. First operand has 332 places, 409 transitions, 4486 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:08:32,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 458 transitions, 6420 flow [2024-06-20 17:08:33,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 458 transitions, 6287 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:33,332 INFO L231 Difference]: Finished difference. Result has 334 places, 421 transitions, 4945 flow [2024-06-20 17:08:33,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4353, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4945, PETRI_PLACES=334, PETRI_TRANSITIONS=421} [2024-06-20 17:08:33,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 17:08:33,332 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 421 transitions, 4945 flow [2024-06-20 17:08:33,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:33,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:33,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:33,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:08:33,333 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)] === [2024-06-20 17:08:33,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1535447799, now seen corresponding path program 5 times [2024-06-20 17:08:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:33,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202497110] [2024-06-20 17:08:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:36,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202497110] [2024-06-20 17:08:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202497110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:36,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:36,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965432605] [2024-06-20 17:08:36,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:36,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:36,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:36,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 421 transitions, 4945 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:36,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:36,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:36,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:38,681 INFO L124 PetriNetUnfolderBase]: 2889/4760 cut-off events. [2024-06-20 17:08:38,681 INFO L125 PetriNetUnfolderBase]: For 369360/369365 co-relation queries the response was YES. [2024-06-20 17:08:38,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33083 conditions, 4760 events. 2889/4760 cut-off events. For 369360/369365 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29516 event pairs, 606 based on Foata normal form. 3/4760 useless extension candidates. Maximal degree in co-relation 32938. Up to 4242 conditions per place. [2024-06-20 17:08:38,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 102 changer transitions 0/456 dead transitions. [2024-06-20 17:08:38,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 456 transitions, 6028 flow [2024-06-20 17:08:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:08:38,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:08:38,745 INFO L175 Difference]: Start difference. First operand has 334 places, 421 transitions, 4945 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:08:38,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 456 transitions, 6028 flow [2024-06-20 17:08:39,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 456 transitions, 5781 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-20 17:08:39,899 INFO L231 Difference]: Finished difference. Result has 340 places, 427 transitions, 5015 flow [2024-06-20 17:08:39,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4730, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5015, PETRI_PLACES=340, PETRI_TRANSITIONS=427} [2024-06-20 17:08:39,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 17:08:39,900 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 427 transitions, 5015 flow [2024-06-20 17:08:39,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:39,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:39,900 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] [2024-06-20 17:08:39,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:08:39,900 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)] === [2024-06-20 17:08:39,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1540690209, now seen corresponding path program 6 times [2024-06-20 17:08:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966008140] [2024-06-20 17:08:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966008140] [2024-06-20 17:08:43,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966008140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:43,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664265634] [2024-06-20 17:08:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:43,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:43,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 427 transitions, 5015 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:43,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:43,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:43,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:45,549 INFO L124 PetriNetUnfolderBase]: 2894/4771 cut-off events. [2024-06-20 17:08:45,550 INFO L125 PetriNetUnfolderBase]: For 376941/376943 co-relation queries the response was YES. [2024-06-20 17:08:45,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33310 conditions, 4771 events. 2894/4771 cut-off events. For 376941/376943 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29621 event pairs, 616 based on Foata normal form. 1/4767 useless extension candidates. Maximal degree in co-relation 33163. Up to 4023 conditions per place. [2024-06-20 17:08:45,611 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 290 selfloop transitions, 171 changer transitions 0/466 dead transitions. [2024-06-20 17:08:45,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 466 transitions, 6585 flow [2024-06-20 17:08:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:08:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:08:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:08:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:08:45,613 INFO L175 Difference]: Start difference. First operand has 340 places, 427 transitions, 5015 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:08:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 466 transitions, 6585 flow [2024-06-20 17:08:46,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 466 transitions, 6353 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:46,781 INFO L231 Difference]: Finished difference. Result has 343 places, 430 transitions, 5177 flow [2024-06-20 17:08:46,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5177, PETRI_PLACES=343, PETRI_TRANSITIONS=430} [2024-06-20 17:08:46,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-20 17:08:46,781 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 430 transitions, 5177 flow [2024-06-20 17:08:46,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:46,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:46,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:46,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:08:46,782 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)] === [2024-06-20 17:08:46,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2113455291, now seen corresponding path program 4 times [2024-06-20 17:08:46,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335685412] [2024-06-20 17:08:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335685412] [2024-06-20 17:08:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335685412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846150996] [2024-06-20 17:08:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:50,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:50,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 430 transitions, 5177 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:50,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:50,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:51,923 INFO L124 PetriNetUnfolderBase]: 2936/4833 cut-off events. [2024-06-20 17:08:51,923 INFO L125 PetriNetUnfolderBase]: For 405418/405423 co-relation queries the response was YES. [2024-06-20 17:08:51,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34473 conditions, 4833 events. 2936/4833 cut-off events. For 405418/405423 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30025 event pairs, 594 based on Foata normal form. 4/4834 useless extension candidates. Maximal degree in co-relation 34325. Up to 4113 conditions per place. [2024-06-20 17:08:51,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 154 changer transitions 0/478 dead transitions. [2024-06-20 17:08:51,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 478 transitions, 6931 flow [2024-06-20 17:08:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:08:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:08:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-20 17:08:51,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:08:51,991 INFO L175 Difference]: Start difference. First operand has 343 places, 430 transitions, 5177 flow. Second operand 12 states and 201 transitions. [2024-06-20 17:08:51,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 478 transitions, 6931 flow [2024-06-20 17:08:53,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 478 transitions, 6541 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:08:53,239 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5305 flow [2024-06-20 17:08:53,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5305, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-20 17:08:53,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-20 17:08:53,239 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5305 flow [2024-06-20 17:08:53,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:53,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:53,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:53,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:08:53,240 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)] === [2024-06-20 17:08:53,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2118996417, now seen corresponding path program 1 times [2024-06-20 17:08:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:53,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700510440] [2024-06-20 17:08:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:53,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:08:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:08:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:08:56,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700510440] [2024-06-20 17:08:56,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700510440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:08:56,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:08:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:08:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875210964] [2024-06-20 17:08:56,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:08:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:08:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:08:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:08:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:08:56,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:08:56,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5305 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:56,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:08:56,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:08:56,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:08:58,347 INFO L124 PetriNetUnfolderBase]: 2978/4888 cut-off events. [2024-06-20 17:08:58,347 INFO L125 PetriNetUnfolderBase]: For 432417/432423 co-relation queries the response was YES. [2024-06-20 17:08:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35639 conditions, 4888 events. 2978/4888 cut-off events. For 432417/432423 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30276 event pairs, 607 based on Foata normal form. 8/4891 useless extension candidates. Maximal degree in co-relation 35490. Up to 4289 conditions per place. [2024-06-20 17:08:58,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 131 changer transitions 0/488 dead transitions. [2024-06-20 17:08:58,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 488 transitions, 6893 flow [2024-06-20 17:08:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:08:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:08:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-20 17:08:58,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-20 17:08:58,419 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5305 flow. Second operand 12 states and 199 transitions. [2024-06-20 17:08:58,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 488 transitions, 6893 flow [2024-06-20 17:08:59,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 488 transitions, 6645 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 17:08:59,778 INFO L231 Difference]: Finished difference. Result has 354 places, 448 transitions, 5499 flow [2024-06-20 17:08:59,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5499, PETRI_PLACES=354, PETRI_TRANSITIONS=448} [2024-06-20 17:08:59,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-20 17:08:59,779 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 448 transitions, 5499 flow [2024-06-20 17:08:59,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:08:59,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:08:59,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:08:59,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:08:59,792 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)] === [2024-06-20 17:08:59,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:08:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -508334281, now seen corresponding path program 7 times [2024-06-20 17:08:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:08:59,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176441458] [2024-06-20 17:08:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:08:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:08:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:03,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:03,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176441458] [2024-06-20 17:09:03,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176441458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:03,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538571075] [2024-06-20 17:09:03,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:03,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:03,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 448 transitions, 5499 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:03,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:05,205 INFO L124 PetriNetUnfolderBase]: 2983/4892 cut-off events. [2024-06-20 17:09:05,205 INFO L125 PetriNetUnfolderBase]: For 438783/438785 co-relation queries the response was YES. [2024-06-20 17:09:05,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36162 conditions, 4892 events. 2983/4892 cut-off events. For 438783/438785 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30310 event pairs, 617 based on Foata normal form. 1/4888 useless extension candidates. Maximal degree in co-relation 36011. Up to 4145 conditions per place. [2024-06-20 17:09:05,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 173 changer transitions 0/482 dead transitions. [2024-06-20 17:09:05,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 482 transitions, 6927 flow [2024-06-20 17:09:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:09:05,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:09:05,282 INFO L175 Difference]: Start difference. First operand has 354 places, 448 transitions, 5499 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:09:05,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 482 transitions, 6927 flow [2024-06-20 17:09:06,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 482 transitions, 6678 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 17:09:06,788 INFO L231 Difference]: Finished difference. Result has 356 places, 451 transitions, 5644 flow [2024-06-20 17:09:06,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5250, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5644, PETRI_PLACES=356, PETRI_TRANSITIONS=451} [2024-06-20 17:09:06,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 17:09:06,789 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 451 transitions, 5644 flow [2024-06-20 17:09:06,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:06,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:06,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:09:06,789 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)] === [2024-06-20 17:09:06,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1950309203, now seen corresponding path program 2 times [2024-06-20 17:09:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633175643] [2024-06-20 17:09:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633175643] [2024-06-20 17:09:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633175643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898479396] [2024-06-20 17:09:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:10,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:10,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:10,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 451 transitions, 5644 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:10,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:10,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:12,428 INFO L124 PetriNetUnfolderBase]: 3009/4943 cut-off events. [2024-06-20 17:09:12,428 INFO L125 PetriNetUnfolderBase]: For 455609/455618 co-relation queries the response was YES. [2024-06-20 17:09:12,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36412 conditions, 4943 events. 3009/4943 cut-off events. For 455609/455618 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30756 event pairs, 599 based on Foata normal form. 10/4950 useless extension candidates. Maximal degree in co-relation 36259. Up to 4475 conditions per place. [2024-06-20 17:09:12,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 88 changer transitions 0/493 dead transitions. [2024-06-20 17:09:12,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 493 transitions, 6950 flow [2024-06-20 17:09:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:09:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:09:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-20 17:09:12,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:09:12,495 INFO L175 Difference]: Start difference. First operand has 356 places, 451 transitions, 5644 flow. Second operand 12 states and 192 transitions. [2024-06-20 17:09:12,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 493 transitions, 6950 flow [2024-06-20 17:09:14,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 493 transitions, 6628 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:14,008 INFO L231 Difference]: Finished difference. Result has 362 places, 457 transitions, 5566 flow [2024-06-20 17:09:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5566, PETRI_PLACES=362, PETRI_TRANSITIONS=457} [2024-06-20 17:09:14,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-20 17:09:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 457 transitions, 5566 flow [2024-06-20 17:09:14,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:14,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:14,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:14,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:09:14,010 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)] === [2024-06-20 17:09:14,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1544713575, now seen corresponding path program 5 times [2024-06-20 17:09:14,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:14,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458914883] [2024-06-20 17:09:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:17,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458914883] [2024-06-20 17:09:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458914883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:17,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:17,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290751512] [2024-06-20 17:09:17,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:17,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:17,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 457 transitions, 5566 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:17,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:19,645 INFO L124 PetriNetUnfolderBase]: 3040/4991 cut-off events. [2024-06-20 17:09:19,646 INFO L125 PetriNetUnfolderBase]: For 472655/472660 co-relation queries the response was YES. [2024-06-20 17:09:19,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36781 conditions, 4991 events. 3040/4991 cut-off events. For 472655/472660 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 31075 event pairs, 599 based on Foata normal form. 4/4992 useless extension candidates. Maximal degree in co-relation 36627. Up to 4243 conditions per place. [2024-06-20 17:09:19,720 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 157 changer transitions 0/500 dead transitions. [2024-06-20 17:09:19,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 500 transitions, 7280 flow [2024-06-20 17:09:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:09:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:09:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-20 17:09:19,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-20 17:09:19,722 INFO L175 Difference]: Start difference. First operand has 362 places, 457 transitions, 5566 flow. Second operand 11 states and 186 transitions. [2024-06-20 17:09:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 500 transitions, 7280 flow [2024-06-20 17:09:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 500 transitions, 7162 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:09:21,916 INFO L231 Difference]: Finished difference. Result has 365 places, 466 transitions, 5872 flow [2024-06-20 17:09:21,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5872, PETRI_PLACES=365, PETRI_TRANSITIONS=466} [2024-06-20 17:09:21,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 17:09:21,917 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 466 transitions, 5872 flow [2024-06-20 17:09:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:21,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:21,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:09:21,918 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)] === [2024-06-20 17:09:21,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:21,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1149542215, now seen corresponding path program 3 times [2024-06-20 17:09:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:21,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251893993] [2024-06-20 17:09:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:21,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251893993] [2024-06-20 17:09:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251893993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:25,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9970001] [2024-06-20 17:09:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:25,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:25,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:25,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 466 transitions, 5872 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:25,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:25,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:25,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:27,493 INFO L124 PetriNetUnfolderBase]: 3034/4982 cut-off events. [2024-06-20 17:09:27,493 INFO L125 PetriNetUnfolderBase]: For 475208/475217 co-relation queries the response was YES. [2024-06-20 17:09:27,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37082 conditions, 4982 events. 3034/4982 cut-off events. For 475208/475217 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 31056 event pairs, 600 based on Foata normal form. 10/4989 useless extension candidates. Maximal degree in co-relation 36926. Up to 4513 conditions per place. [2024-06-20 17:09:27,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 88 changer transitions 0/502 dead transitions. [2024-06-20 17:09:27,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 502 transitions, 6964 flow [2024-06-20 17:09:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:09:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:09:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 202 transitions. [2024-06-20 17:09:27,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36996336996337 [2024-06-20 17:09:27,572 INFO L175 Difference]: Start difference. First operand has 365 places, 466 transitions, 5872 flow. Second operand 13 states and 202 transitions. [2024-06-20 17:09:27,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 502 transitions, 6964 flow [2024-06-20 17:09:29,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 502 transitions, 6717 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:09:29,368 INFO L231 Difference]: Finished difference. Result has 373 places, 466 transitions, 5807 flow [2024-06-20 17:09:29,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5807, PETRI_PLACES=373, PETRI_TRANSITIONS=466} [2024-06-20 17:09:29,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-20 17:09:29,368 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 466 transitions, 5807 flow [2024-06-20 17:09:29,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:29,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:29,369 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] [2024-06-20 17:09:29,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:09:29,369 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)] === [2024-06-20 17:09:29,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1544707809, now seen corresponding path program 8 times [2024-06-20 17:09:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925802698] [2024-06-20 17:09:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:32,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925802698] [2024-06-20 17:09:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925802698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:32,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:32,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427999084] [2024-06-20 17:09:32,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:32,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:32,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:32,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 466 transitions, 5807 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:32,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:32,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:34,844 INFO L124 PetriNetUnfolderBase]: 3047/5009 cut-off events. [2024-06-20 17:09:34,844 INFO L125 PetriNetUnfolderBase]: For 484423/484428 co-relation queries the response was YES. [2024-06-20 17:09:34,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 5009 events. 3047/5009 cut-off events. For 484423/484428 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31297 event pairs, 620 based on Foata normal form. 3/5009 useless extension candidates. Maximal degree in co-relation 37077. Up to 4445 conditions per place. [2024-06-20 17:09:34,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 115 changer transitions 0/498 dead transitions. [2024-06-20 17:09:34,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 498 transitions, 7141 flow [2024-06-20 17:09:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:09:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:09:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:09:34,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:09:34,908 INFO L175 Difference]: Start difference. First operand has 373 places, 466 transitions, 5807 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:09:34,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 498 transitions, 7141 flow [2024-06-20 17:09:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 498 transitions, 6961 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 17:09:36,619 INFO L231 Difference]: Finished difference. Result has 371 places, 472 transitions, 5988 flow [2024-06-20 17:09:36,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5988, PETRI_PLACES=371, PETRI_TRANSITIONS=472} [2024-06-20 17:09:36,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-20 17:09:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 472 transitions, 5988 flow [2024-06-20 17:09:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:36,621 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] [2024-06-20 17:09:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:09:36,621 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)] === [2024-06-20 17:09:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1313905729, now seen corresponding path program 6 times [2024-06-20 17:09:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984822899] [2024-06-20 17:09:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984822899] [2024-06-20 17:09:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984822899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:40,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876371664] [2024-06-20 17:09:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:40,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:40,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:40,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:40,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 472 transitions, 5988 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:40,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:42,138 INFO L124 PetriNetUnfolderBase]: 3041/4995 cut-off events. [2024-06-20 17:09:42,138 INFO L125 PetriNetUnfolderBase]: For 490560/490565 co-relation queries the response was YES. [2024-06-20 17:09:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37210 conditions, 4995 events. 3041/4995 cut-off events. For 490560/490565 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31138 event pairs, 597 based on Foata normal form. 4/4996 useless extension candidates. Maximal degree in co-relation 37051. Up to 4248 conditions per place. [2024-06-20 17:09:42,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 158 changer transitions 0/508 dead transitions. [2024-06-20 17:09:42,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 508 transitions, 7452 flow [2024-06-20 17:09:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:09:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:09:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-20 17:09:42,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-20 17:09:42,208 INFO L175 Difference]: Start difference. First operand has 371 places, 472 transitions, 5988 flow. Second operand 13 states and 210 transitions. [2024-06-20 17:09:42,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 508 transitions, 7452 flow [2024-06-20 17:09:43,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 508 transitions, 7183 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:09:43,796 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6041 flow [2024-06-20 17:09:43,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6041, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-20 17:09:43,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 17:09:43,797 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6041 flow [2024-06-20 17:09:43,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:43,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:43,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:43,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:09:43,797 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)] === [2024-06-20 17:09:43,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2122709535, now seen corresponding path program 9 times [2024-06-20 17:09:43,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828430542] [2024-06-20 17:09:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:47,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:47,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828430542] [2024-06-20 17:09:47,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828430542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:47,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:47,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129419618] [2024-06-20 17:09:47,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:47,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:47,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6041 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:47,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:47,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:47,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:49,577 INFO L124 PetriNetUnfolderBase]: 3038/4993 cut-off events. [2024-06-20 17:09:49,578 INFO L125 PetriNetUnfolderBase]: For 491956/491961 co-relation queries the response was YES. [2024-06-20 17:09:49,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37301 conditions, 4993 events. 3038/4993 cut-off events. For 491956/491961 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31155 event pairs, 617 based on Foata normal form. 3/4993 useless extension candidates. Maximal degree in co-relation 37141. Up to 4434 conditions per place. [2024-06-20 17:09:49,654 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 116 changer transitions 0/499 dead transitions. [2024-06-20 17:09:49,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 499 transitions, 7101 flow [2024-06-20 17:09:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:09:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:09:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 17:09:49,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:09:49,656 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6041 flow. Second operand 11 states and 176 transitions. [2024-06-20 17:09:49,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 499 transitions, 7101 flow [2024-06-20 17:09:51,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 499 transitions, 6733 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-20 17:09:51,247 INFO L231 Difference]: Finished difference. Result has 377 places, 472 transitions, 5911 flow [2024-06-20 17:09:51,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5673, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5911, PETRI_PLACES=377, PETRI_TRANSITIONS=472} [2024-06-20 17:09:51,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-20 17:09:51,248 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 472 transitions, 5911 flow [2024-06-20 17:09:51,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:51,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:51,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:09:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:09:51,249 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)] === [2024-06-20 17:09:51,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1554143711, now seen corresponding path program 4 times [2024-06-20 17:09:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:51,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991121101] [2024-06-20 17:09:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:51,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:09:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:09:54,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:09:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991121101] [2024-06-20 17:09:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991121101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:09:54,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:09:54,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:09:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673171587] [2024-06-20 17:09:54,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:09:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:09:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:09:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:09:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:09:54,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:09:54,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 472 transitions, 5911 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:54,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:09:54,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:09:54,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:09:56,976 INFO L124 PetriNetUnfolderBase]: 3096/5082 cut-off events. [2024-06-20 17:09:56,976 INFO L125 PetriNetUnfolderBase]: For 531922/531931 co-relation queries the response was YES. [2024-06-20 17:09:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38203 conditions, 5082 events. 3096/5082 cut-off events. For 531922/531931 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31760 event pairs, 601 based on Foata normal form. 10/5089 useless extension candidates. Maximal degree in co-relation 38042. Up to 4552 conditions per place. [2024-06-20 17:09:57,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 102 changer transitions 0/524 dead transitions. [2024-06-20 17:09:57,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 524 transitions, 7755 flow [2024-06-20 17:09:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:09:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:09:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-06-20 17:09:57,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:09:57,051 INFO L175 Difference]: Start difference. First operand has 377 places, 472 transitions, 5911 flow. Second operand 15 states and 231 transitions. [2024-06-20 17:09:57,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 524 transitions, 7755 flow [2024-06-20 17:09:58,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 524 transitions, 7504 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:09:58,690 INFO L231 Difference]: Finished difference. Result has 383 places, 484 transitions, 6039 flow [2024-06-20 17:09:58,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6039, PETRI_PLACES=383, PETRI_TRANSITIONS=484} [2024-06-20 17:09:58,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 17:09:58,691 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 484 transitions, 6039 flow [2024-06-20 17:09:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:09:58,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:09:58,691 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] [2024-06-20 17:09:58,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:09:58,705 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)] === [2024-06-20 17:09:58,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:09:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1554149291, now seen corresponding path program 5 times [2024-06-20 17:09:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:09:58,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024135009] [2024-06-20 17:09:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:09:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:09:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:01,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:01,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024135009] [2024-06-20 17:10:01,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024135009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:01,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:01,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649466115] [2024-06-20 17:10:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:01,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:01,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 484 transitions, 6039 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:01,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:01,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:01,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:04,250 INFO L124 PetriNetUnfolderBase]: 3090/5074 cut-off events. [2024-06-20 17:10:04,251 INFO L125 PetriNetUnfolderBase]: For 533449/533458 co-relation queries the response was YES. [2024-06-20 17:10:04,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38148 conditions, 5074 events. 3090/5074 cut-off events. For 533449/533458 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31762 event pairs, 600 based on Foata normal form. 10/5081 useless extension candidates. Maximal degree in co-relation 37985. Up to 4547 conditions per place. [2024-06-20 17:10:04,330 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 102 changer transitions 0/519 dead transitions. [2024-06-20 17:10:04,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 519 transitions, 7539 flow [2024-06-20 17:10:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:10:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:10:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-20 17:10:04,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-20 17:10:04,332 INFO L175 Difference]: Start difference. First operand has 383 places, 484 transitions, 6039 flow. Second operand 13 states and 204 transitions. [2024-06-20 17:10:04,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 519 transitions, 7539 flow [2024-06-20 17:10:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 519 transitions, 7313 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-20 17:10:06,373 INFO L231 Difference]: Finished difference. Result has 386 places, 484 transitions, 6023 flow [2024-06-20 17:10:06,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6023, PETRI_PLACES=386, PETRI_TRANSITIONS=484} [2024-06-20 17:10:06,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-20 17:10:06,373 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 484 transitions, 6023 flow [2024-06-20 17:10:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:06,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:06,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:10:06,375 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)] === [2024-06-20 17:10:06,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:06,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1554143897, now seen corresponding path program 7 times [2024-06-20 17:10:06,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:06,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302332722] [2024-06-20 17:10:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:06,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302332722] [2024-06-20 17:10:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302332722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:09,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:09,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29459590] [2024-06-20 17:10:09,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:10,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:10,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 484 transitions, 6023 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:11,942 INFO L124 PetriNetUnfolderBase]: 3195/5219 cut-off events. [2024-06-20 17:10:11,942 INFO L125 PetriNetUnfolderBase]: For 591928/591933 co-relation queries the response was YES. [2024-06-20 17:10:11,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40129 conditions, 5219 events. 3195/5219 cut-off events. For 591928/591933 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32633 event pairs, 606 based on Foata normal form. 4/5220 useless extension candidates. Maximal degree in co-relation 39965. Up to 4413 conditions per place. [2024-06-20 17:10:12,004 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 179 changer transitions 0/544 dead transitions. [2024-06-20 17:10:12,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 544 transitions, 8324 flow [2024-06-20 17:10:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:10:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:10:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-20 17:10:12,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:10:12,006 INFO L175 Difference]: Start difference. First operand has 386 places, 484 transitions, 6023 flow. Second operand 12 states and 198 transitions. [2024-06-20 17:10:12,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 544 transitions, 8324 flow [2024-06-20 17:10:13,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 8120 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 17:10:13,757 INFO L231 Difference]: Finished difference. Result has 386 places, 511 transitions, 6558 flow [2024-06-20 17:10:13,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6558, PETRI_PLACES=386, PETRI_TRANSITIONS=511} [2024-06-20 17:10:13,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-20 17:10:13,758 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 511 transitions, 6558 flow [2024-06-20 17:10:13,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:13,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:13,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:10:13,758 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)] === [2024-06-20 17:10:13,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1557874313, now seen corresponding path program 10 times [2024-06-20 17:10:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:13,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866428355] [2024-06-20 17:10:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866428355] [2024-06-20 17:10:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866428355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:17,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069017415] [2024-06-20 17:10:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:17,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:17,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:17,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 511 transitions, 6558 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:17,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:17,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:17,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:19,429 INFO L124 PetriNetUnfolderBase]: 3200/5242 cut-off events. [2024-06-20 17:10:19,430 INFO L125 PetriNetUnfolderBase]: For 598480/598482 co-relation queries the response was YES. [2024-06-20 17:10:19,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40590 conditions, 5242 events. 3200/5242 cut-off events. For 598480/598482 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32870 event pairs, 627 based on Foata normal form. 1/5241 useless extension candidates. Maximal degree in co-relation 40425. Up to 4821 conditions per place. [2024-06-20 17:10:19,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 52 changer transitions 0/535 dead transitions. [2024-06-20 17:10:19,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 535 transitions, 7734 flow [2024-06-20 17:10:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:10:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:10:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:10:19,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-20 17:10:19,506 INFO L175 Difference]: Start difference. First operand has 386 places, 511 transitions, 6558 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:10:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 535 transitions, 7734 flow [2024-06-20 17:10:21,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 535 transitions, 7551 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:10:21,380 INFO L231 Difference]: Finished difference. Result has 392 places, 514 transitions, 6552 flow [2024-06-20 17:10:21,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6552, PETRI_PLACES=392, PETRI_TRANSITIONS=514} [2024-06-20 17:10:21,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:10:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 514 transitions, 6552 flow [2024-06-20 17:10:21,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:21,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:21,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:21,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:10:21,381 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)] === [2024-06-20 17:10:21,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -389215677, now seen corresponding path program 11 times [2024-06-20 17:10:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926827570] [2024-06-20 17:10:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:24,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926827570] [2024-06-20 17:10:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926827570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:24,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:24,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839656450] [2024-06-20 17:10:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:24,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:24,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 514 transitions, 6552 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:24,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:24,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:24,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:26,891 INFO L124 PetriNetUnfolderBase]: 3221/5279 cut-off events. [2024-06-20 17:10:26,892 INFO L125 PetriNetUnfolderBase]: For 621393/621398 co-relation queries the response was YES. [2024-06-20 17:10:26,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40846 conditions, 5279 events. 3221/5279 cut-off events. For 621393/621398 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33213 event pairs, 638 based on Foata normal form. 3/5279 useless extension candidates. Maximal degree in co-relation 40680. Up to 4655 conditions per place. [2024-06-20 17:10:26,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 140 changer transitions 0/547 dead transitions. [2024-06-20 17:10:26,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 547 transitions, 8264 flow [2024-06-20 17:10:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 17:10:26,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-20 17:10:26,973 INFO L175 Difference]: Start difference. First operand has 392 places, 514 transitions, 6552 flow. Second operand 10 states and 163 transitions. [2024-06-20 17:10:26,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 547 transitions, 8264 flow [2024-06-20 17:10:29,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 547 transitions, 8131 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:29,166 INFO L231 Difference]: Finished difference. Result has 398 places, 523 transitions, 6941 flow [2024-06-20 17:10:29,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6941, PETRI_PLACES=398, PETRI_TRANSITIONS=523} [2024-06-20 17:10:29,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-20 17:10:29,166 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 523 transitions, 6941 flow [2024-06-20 17:10:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:29,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:29,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:10:29,167 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)] === [2024-06-20 17:10:29,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1546912217, now seen corresponding path program 8 times [2024-06-20 17:10:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461343890] [2024-06-20 17:10:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:32,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461343890] [2024-06-20 17:10:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461343890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:32,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378457975] [2024-06-20 17:10:32,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:32,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:32,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 523 transitions, 6941 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:32,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:32,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:33,991 INFO L124 PetriNetUnfolderBase]: 3241/5313 cut-off events. [2024-06-20 17:10:33,991 INFO L125 PetriNetUnfolderBase]: For 638862/638864 co-relation queries the response was YES. [2024-06-20 17:10:34,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41446 conditions, 5313 events. 3241/5313 cut-off events. For 638862/638864 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33480 event pairs, 613 based on Foata normal form. 2/5313 useless extension candidates. Maximal degree in co-relation 41277. Up to 4831 conditions per place. [2024-06-20 17:10:34,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 61 changer transitions 0/555 dead transitions. [2024-06-20 17:10:34,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 555 transitions, 8205 flow [2024-06-20 17:10:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 17:10:34,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 17:10:34,071 INFO L175 Difference]: Start difference. First operand has 398 places, 523 transitions, 6941 flow. Second operand 10 states and 161 transitions. [2024-06-20 17:10:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 555 transitions, 8205 flow [2024-06-20 17:10:36,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 555 transitions, 7909 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:36,547 INFO L231 Difference]: Finished difference. Result has 402 places, 529 transitions, 6877 flow [2024-06-20 17:10:36,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6877, PETRI_PLACES=402, PETRI_TRANSITIONS=529} [2024-06-20 17:10:36,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-20 17:10:36,548 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 529 transitions, 6877 flow [2024-06-20 17:10:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:36,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:36,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:10:36,549 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)] === [2024-06-20 17:10:36,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash -392940141, now seen corresponding path program 9 times [2024-06-20 17:10:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:36,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993242586] [2024-06-20 17:10:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:40,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:40,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993242586] [2024-06-20 17:10:40,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993242586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:40,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:40,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:40,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457121549] [2024-06-20 17:10:40,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:40,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:40,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:40,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:40,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 529 transitions, 6877 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:40,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:40,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:40,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:42,597 INFO L124 PetriNetUnfolderBase]: 3235/5301 cut-off events. [2024-06-20 17:10:42,598 INFO L125 PetriNetUnfolderBase]: For 640400/640402 co-relation queries the response was YES. [2024-06-20 17:10:42,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41124 conditions, 5301 events. 3235/5301 cut-off events. For 640400/640402 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33401 event pairs, 609 based on Foata normal form. 2/5301 useless extension candidates. Maximal degree in co-relation 40954. Up to 4798 conditions per place. [2024-06-20 17:10:42,675 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 75 changer transitions 0/559 dead transitions. [2024-06-20 17:10:42,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 559 transitions, 8259 flow [2024-06-20 17:10:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:10:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:10:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-20 17:10:42,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:10:42,676 INFO L175 Difference]: Start difference. First operand has 402 places, 529 transitions, 6877 flow. Second operand 12 states and 188 transitions. [2024-06-20 17:10:42,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 559 transitions, 8259 flow [2024-06-20 17:10:44,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 559 transitions, 8135 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:10:44,885 INFO L231 Difference]: Finished difference. Result has 408 places, 529 transitions, 6910 flow [2024-06-20 17:10:44,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6910, PETRI_PLACES=408, PETRI_TRANSITIONS=529} [2024-06-20 17:10:44,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-20 17:10:44,886 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 529 transitions, 6910 flow [2024-06-20 17:10:44,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:44,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:44,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:44,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:10:44,886 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)] === [2024-06-20 17:10:44,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1843619581, now seen corresponding path program 10 times [2024-06-20 17:10:44,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:44,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353810371] [2024-06-20 17:10:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:44,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353810371] [2024-06-20 17:10:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353810371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:48,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:48,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190857855] [2024-06-20 17:10:48,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:48,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:48,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:48,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:48,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 529 transitions, 6910 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:48,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:48,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:48,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:50,301 INFO L124 PetriNetUnfolderBase]: 3229/5285 cut-off events. [2024-06-20 17:10:50,302 INFO L125 PetriNetUnfolderBase]: For 643106/643111 co-relation queries the response was YES. [2024-06-20 17:10:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41013 conditions, 5285 events. 3229/5285 cut-off events. For 643106/643111 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33204 event pairs, 615 based on Foata normal form. 4/5286 useless extension candidates. Maximal degree in co-relation 40842. Up to 4455 conditions per place. [2024-06-20 17:10:50,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 178 changer transitions 0/558 dead transitions. [2024-06-20 17:10:50,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 558 transitions, 8694 flow [2024-06-20 17:10:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:10:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:10:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 17:10:50,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:10:50,383 INFO L175 Difference]: Start difference. First operand has 408 places, 529 transitions, 6910 flow. Second operand 10 states and 170 transitions. [2024-06-20 17:10:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 558 transitions, 8694 flow [2024-06-20 17:10:52,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 558 transitions, 8539 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 17:10:52,865 INFO L231 Difference]: Finished difference. Result has 409 places, 529 transitions, 7117 flow [2024-06-20 17:10:52,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7117, PETRI_PLACES=409, PETRI_TRANSITIONS=529} [2024-06-20 17:10:52,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-20 17:10:52,866 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 529 transitions, 7117 flow [2024-06-20 17:10:52,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:52,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:10:52,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:10:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:10:52,866 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)] === [2024-06-20 17:10:52,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:10:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1557636977, now seen corresponding path program 11 times [2024-06-20 17:10:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:10:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852818684] [2024-06-20 17:10:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:10:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:10:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:10:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:10:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:10:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852818684] [2024-06-20 17:10:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852818684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:10:56,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:10:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:10:56,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144490980] [2024-06-20 17:10:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:10:56,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:10:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:10:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:10:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:10:56,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:10:56,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 529 transitions, 7117 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:10:56,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:10:56,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:10:56,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:10:58,738 INFO L124 PetriNetUnfolderBase]: 3223/5279 cut-off events. [2024-06-20 17:10:58,738 INFO L125 PetriNetUnfolderBase]: For 645001/645003 co-relation queries the response was YES. [2024-06-20 17:10:58,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41167 conditions, 5279 events. 3223/5279 cut-off events. For 645001/645003 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33212 event pairs, 606 based on Foata normal form. 2/5279 useless extension candidates. Maximal degree in co-relation 40995. Up to 4785 conditions per place. [2024-06-20 17:10:58,809 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 75 changer transitions 0/562 dead transitions. [2024-06-20 17:10:58,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 562 transitions, 8311 flow [2024-06-20 17:10:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:10:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:10:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 213 transitions. [2024-06-20 17:10:58,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3622448979591837 [2024-06-20 17:10:58,811 INFO L175 Difference]: Start difference. First operand has 409 places, 529 transitions, 7117 flow. Second operand 14 states and 213 transitions. [2024-06-20 17:10:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 562 transitions, 8311 flow [2024-06-20 17:11:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 562 transitions, 7905 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 17:11:01,434 INFO L231 Difference]: Finished difference. Result has 415 places, 529 transitions, 6867 flow [2024-06-20 17:11:01,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6711, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6867, PETRI_PLACES=415, PETRI_TRANSITIONS=529} [2024-06-20 17:11:01,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-20 17:11:01,435 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 529 transitions, 6867 flow [2024-06-20 17:11:01,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:01,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:01,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:01,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:11:01,436 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)] === [2024-06-20 17:11:01,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1546792061, now seen corresponding path program 6 times [2024-06-20 17:11:01,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:01,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528942392] [2024-06-20 17:11:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:04,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528942392] [2024-06-20 17:11:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528942392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:04,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726559665] [2024-06-20 17:11:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:04,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:04,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 529 transitions, 6867 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:04,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:04,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:04,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:07,121 INFO L124 PetriNetUnfolderBase]: 3217/5269 cut-off events. [2024-06-20 17:11:07,121 INFO L125 PetriNetUnfolderBase]: For 644626/644635 co-relation queries the response was YES. [2024-06-20 17:11:07,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40631 conditions, 5269 events. 3217/5269 cut-off events. For 644626/644635 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33168 event pairs, 606 based on Foata normal form. 10/5276 useless extension candidates. Maximal degree in co-relation 40458. Up to 4727 conditions per place. [2024-06-20 17:11:07,198 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 102 changer transitions 0/561 dead transitions. [2024-06-20 17:11:07,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 561 transitions, 8271 flow [2024-06-20 17:11:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-20 17:11:07,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 17:11:07,200 INFO L175 Difference]: Start difference. First operand has 415 places, 529 transitions, 6867 flow. Second operand 12 states and 188 transitions. [2024-06-20 17:11:07,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 561 transitions, 8271 flow [2024-06-20 17:11:09,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 561 transitions, 8062 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-20 17:11:09,863 INFO L231 Difference]: Finished difference. Result has 413 places, 529 transitions, 6868 flow [2024-06-20 17:11:09,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6868, PETRI_PLACES=413, PETRI_TRANSITIONS=529} [2024-06-20 17:11:09,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 17:11:09,864 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 529 transitions, 6868 flow [2024-06-20 17:11:09,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:09,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:09,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:11:09,865 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)] === [2024-06-20 17:11:09,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1554155057, now seen corresponding path program 12 times [2024-06-20 17:11:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:09,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275638766] [2024-06-20 17:11:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275638766] [2024-06-20 17:11:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275638766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:13,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:13,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731038640] [2024-06-20 17:11:13,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:13,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:13,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:13,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 529 transitions, 6868 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:13,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:13,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:13,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:15,596 INFO L124 PetriNetUnfolderBase]: 3211/5261 cut-off events. [2024-06-20 17:11:15,596 INFO L125 PetriNetUnfolderBase]: For 645707/645712 co-relation queries the response was YES. [2024-06-20 17:11:15,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40508 conditions, 5261 events. 3211/5261 cut-off events. For 645707/645712 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33080 event pairs, 611 based on Foata normal form. 4/5262 useless extension candidates. Maximal degree in co-relation 40334. Up to 4437 conditions per place. [2024-06-20 17:11:15,674 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 187 changer transitions 0/561 dead transitions. [2024-06-20 17:11:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 561 transitions, 8474 flow [2024-06-20 17:11:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:11:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:11:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-20 17:11:15,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791208791208791 [2024-06-20 17:11:15,677 INFO L175 Difference]: Start difference. First operand has 413 places, 529 transitions, 6868 flow. Second operand 13 states and 207 transitions. [2024-06-20 17:11:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 561 transitions, 8474 flow [2024-06-20 17:11:18,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 561 transitions, 8261 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 17:11:18,120 INFO L231 Difference]: Finished difference. Result has 416 places, 529 transitions, 7035 flow [2024-06-20 17:11:18,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7035, PETRI_PLACES=416, PETRI_TRANSITIONS=529} [2024-06-20 17:11:18,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 17:11:18,121 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 529 transitions, 7035 flow [2024-06-20 17:11:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:18,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:18,121 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] [2024-06-20 17:11:18,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:11:18,121 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)] === [2024-06-20 17:11:18,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1554155243, now seen corresponding path program 12 times [2024-06-20 17:11:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:18,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146307399] [2024-06-20 17:11:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:21,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:21,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146307399] [2024-06-20 17:11:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146307399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579926943] [2024-06-20 17:11:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:21,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 529 transitions, 7035 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:23,864 INFO L124 PetriNetUnfolderBase]: 3208/5267 cut-off events. [2024-06-20 17:11:23,864 INFO L125 PetriNetUnfolderBase]: For 647037/647042 co-relation queries the response was YES. [2024-06-20 17:11:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40731 conditions, 5267 events. 3208/5267 cut-off events. For 647037/647042 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33270 event pairs, 637 based on Foata normal form. 3/5267 useless extension candidates. Maximal degree in co-relation 40556. Up to 4640 conditions per place. [2024-06-20 17:11:23,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 141 changer transitions 0/554 dead transitions. [2024-06-20 17:11:23,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 554 transitions, 8407 flow [2024-06-20 17:11:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:11:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:11:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-20 17:11:23,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 17:11:23,947 INFO L175 Difference]: Start difference. First operand has 416 places, 529 transitions, 7035 flow. Second operand 12 states and 186 transitions. [2024-06-20 17:11:23,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 554 transitions, 8407 flow [2024-06-20 17:11:26,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 554 transitions, 7967 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-20 17:11:26,672 INFO L231 Difference]: Finished difference. Result has 416 places, 529 transitions, 6883 flow [2024-06-20 17:11:26,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6883, PETRI_PLACES=416, PETRI_TRANSITIONS=529} [2024-06-20 17:11:26,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 17:11:26,673 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 529 transitions, 6883 flow [2024-06-20 17:11:26,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:26,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:26,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:26,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:11:26,673 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)] === [2024-06-20 17:11:26,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash -623926885, now seen corresponding path program 4 times [2024-06-20 17:11:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:26,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260355274] [2024-06-20 17:11:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:26,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260355274] [2024-06-20 17:11:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260355274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:29,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132209297] [2024-06-20 17:11:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:30,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:30,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 529 transitions, 6883 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:30,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:30,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:31,835 INFO L124 PetriNetUnfolderBase]: 3190/5234 cut-off events. [2024-06-20 17:11:31,835 INFO L125 PetriNetUnfolderBase]: For 651464/651470 co-relation queries the response was YES. [2024-06-20 17:11:31,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39555 conditions, 5234 events. 3190/5234 cut-off events. For 651464/651470 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32903 event pairs, 467 based on Foata normal form. 14/5246 useless extension candidates. Maximal degree in co-relation 39379. Up to 4423 conditions per place. [2024-06-20 17:11:31,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 492 selfloop transitions, 78 changer transitions 0/575 dead transitions. [2024-06-20 17:11:31,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 8203 flow [2024-06-20 17:11:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 17:11:31,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:11:31,907 INFO L175 Difference]: Start difference. First operand has 416 places, 529 transitions, 6883 flow. Second operand 10 states and 175 transitions. [2024-06-20 17:11:31,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 8203 flow [2024-06-20 17:11:34,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 575 transitions, 7925 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 17:11:34,254 INFO L231 Difference]: Finished difference. Result has 416 places, 529 transitions, 6771 flow [2024-06-20 17:11:34,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6771, PETRI_PLACES=416, PETRI_TRANSITIONS=529} [2024-06-20 17:11:34,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 17:11:34,255 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 529 transitions, 6771 flow [2024-06-20 17:11:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:34,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:34,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:34,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:11:34,256 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)] === [2024-06-20 17:11:34,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1720491819, now seen corresponding path program 13 times [2024-06-20 17:11:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014845467] [2024-06-20 17:11:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:34,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014845467] [2024-06-20 17:11:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014845467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:37,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:37,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923333765] [2024-06-20 17:11:37,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:37,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:37,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 529 transitions, 6771 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:37,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:37,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:37,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:39,680 INFO L124 PetriNetUnfolderBase]: 3203/5262 cut-off events. [2024-06-20 17:11:39,680 INFO L125 PetriNetUnfolderBase]: For 630047/630053 co-relation queries the response was YES. [2024-06-20 17:11:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39992 conditions, 5262 events. 3203/5262 cut-off events. For 630047/630053 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33204 event pairs, 639 based on Foata normal form. 2/5256 useless extension candidates. Maximal degree in co-relation 39815. Up to 4429 conditions per place. [2024-06-20 17:11:39,754 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 216 changer transitions 0/567 dead transitions. [2024-06-20 17:11:39,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 567 transitions, 8555 flow [2024-06-20 17:11:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:11:39,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 17:11:39,755 INFO L175 Difference]: Start difference. First operand has 416 places, 529 transitions, 6771 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:11:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 567 transitions, 8555 flow [2024-06-20 17:11:42,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 567 transitions, 8419 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:11:42,479 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 7229 flow [2024-06-20 17:11:42,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7229, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-20 17:11:42,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 17:11:42,480 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 7229 flow [2024-06-20 17:11:42,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:42,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:42,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:11:42,480 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)] === [2024-06-20 17:11:42,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -292159181, now seen corresponding path program 14 times [2024-06-20 17:11:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850127582] [2024-06-20 17:11:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850127582] [2024-06-20 17:11:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850127582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:45,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251878949] [2024-06-20 17:11:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:45,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:45,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:45,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:45,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 7229 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:45,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:45,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:45,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:47,923 INFO L124 PetriNetUnfolderBase]: 3208/5271 cut-off events. [2024-06-20 17:11:47,924 INFO L125 PetriNetUnfolderBase]: For 609438/609444 co-relation queries the response was YES. [2024-06-20 17:11:47,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40130 conditions, 5271 events. 3208/5271 cut-off events. For 609438/609444 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33307 event pairs, 641 based on Foata normal form. 2/5265 useless extension candidates. Maximal degree in co-relation 39953. Up to 4435 conditions per place. [2024-06-20 17:11:48,005 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 216 changer transitions 0/566 dead transitions. [2024-06-20 17:11:48,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 566 transitions, 8925 flow [2024-06-20 17:11:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:11:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:11:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:11:48,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:11:48,006 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 7229 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:11:48,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 566 transitions, 8925 flow [2024-06-20 17:11:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 566 transitions, 8491 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:50,570 INFO L231 Difference]: Finished difference. Result has 422 places, 538 transitions, 7311 flow [2024-06-20 17:11:50,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7311, PETRI_PLACES=422, PETRI_TRANSITIONS=538} [2024-06-20 17:11:50,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-20 17:11:50,570 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 538 transitions, 7311 flow [2024-06-20 17:11:50,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:50,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:50,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:50,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:11:50,571 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)] === [2024-06-20 17:11:50,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash -809329395, now seen corresponding path program 7 times [2024-06-20 17:11:50,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:50,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155703753] [2024-06-20 17:11:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:11:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:11:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:11:53,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155703753] [2024-06-20 17:11:53,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155703753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:11:53,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:11:53,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:11:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56029189] [2024-06-20 17:11:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:11:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:11:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:11:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:11:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:11:53,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:11:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 538 transitions, 7311 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:11:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:11:53,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:11:55,845 INFO L124 PetriNetUnfolderBase]: 3234/5309 cut-off events. [2024-06-20 17:11:55,845 INFO L125 PetriNetUnfolderBase]: For 637324/637340 co-relation queries the response was YES. [2024-06-20 17:11:55,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40612 conditions, 5309 events. 3234/5309 cut-off events. For 637324/637340 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33512 event pairs, 622 based on Foata normal form. 16/5321 useless extension candidates. Maximal degree in co-relation 40434. Up to 4766 conditions per place. [2024-06-20 17:11:55,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 105 changer transitions 0/576 dead transitions. [2024-06-20 17:11:55,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 576 transitions, 8845 flow [2024-06-20 17:11:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:11:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:11:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:11:55,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:11:55,939 INFO L175 Difference]: Start difference. First operand has 422 places, 538 transitions, 7311 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:11:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 576 transitions, 8845 flow [2024-06-20 17:11:58,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 576 transitions, 8511 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:11:58,798 INFO L231 Difference]: Finished difference. Result has 427 places, 544 transitions, 7287 flow [2024-06-20 17:11:58,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7287, PETRI_PLACES=427, PETRI_TRANSITIONS=544} [2024-06-20 17:11:58,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-20 17:11:58,799 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 544 transitions, 7287 flow [2024-06-20 17:11:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:11:58,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:11:58,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:11:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:11:58,799 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:11:58,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:11:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1219025545, now seen corresponding path program 8 times [2024-06-20 17:11:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:11:58,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790710342] [2024-06-20 17:11:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:11:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:11:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:01,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:01,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790710342] [2024-06-20 17:12:01,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790710342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:01,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:01,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:01,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034372352] [2024-06-20 17:12:01,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:01,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:01,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:01,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:01,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 544 transitions, 7287 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:01,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:01,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:01,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:03,977 INFO L124 PetriNetUnfolderBase]: 3276/5373 cut-off events. [2024-06-20 17:12:03,977 INFO L125 PetriNetUnfolderBase]: For 668808/668824 co-relation queries the response was YES. [2024-06-20 17:12:04,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41012 conditions, 5373 events. 3276/5373 cut-off events. For 668808/668824 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 33966 event pairs, 569 based on Foata normal form. 16/5385 useless extension candidates. Maximal degree in co-relation 40833. Up to 4492 conditions per place. [2024-06-20 17:12:04,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 187 changer transitions 0/587 dead transitions. [2024-06-20 17:12:04,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 587 transitions, 9177 flow [2024-06-20 17:12:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:12:04,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:12:04,068 INFO L175 Difference]: Start difference. First operand has 427 places, 544 transitions, 7287 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:12:04,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 587 transitions, 9177 flow [2024-06-20 17:12:07,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 587 transitions, 8996 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:07,409 INFO L231 Difference]: Finished difference. Result has 430 places, 556 transitions, 7704 flow [2024-06-20 17:12:07,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7120, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7704, PETRI_PLACES=430, PETRI_TRANSITIONS=556} [2024-06-20 17:12:07,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-20 17:12:07,410 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 556 transitions, 7704 flow [2024-06-20 17:12:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:07,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:07,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:12:07,410 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:07,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash -49004255, now seen corresponding path program 15 times [2024-06-20 17:12:07,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:07,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939478249] [2024-06-20 17:12:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:10,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939478249] [2024-06-20 17:12:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939478249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:10,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:10,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:10,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528236864] [2024-06-20 17:12:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:10,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:10,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 556 transitions, 7704 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:10,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:10,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:13,253 INFO L124 PetriNetUnfolderBase]: 3297/5394 cut-off events. [2024-06-20 17:12:13,253 INFO L125 PetriNetUnfolderBase]: For 691247/691253 co-relation queries the response was YES. [2024-06-20 17:12:13,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42356 conditions, 5394 events. 3297/5394 cut-off events. For 691247/691253 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34034 event pairs, 642 based on Foata normal form. 2/5388 useless extension candidates. Maximal degree in co-relation 42175. Up to 4553 conditions per place. [2024-06-20 17:12:13,343 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 210 changer transitions 0/599 dead transitions. [2024-06-20 17:12:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 599 transitions, 10043 flow [2024-06-20 17:12:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:12:13,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:12:13,345 INFO L175 Difference]: Start difference. First operand has 430 places, 556 transitions, 7704 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:12:13,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 599 transitions, 10043 flow [2024-06-20 17:12:16,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 599 transitions, 9835 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-20 17:12:16,608 INFO L231 Difference]: Finished difference. Result has 435 places, 565 transitions, 8117 flow [2024-06-20 17:12:16,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7496, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8117, PETRI_PLACES=435, PETRI_TRANSITIONS=565} [2024-06-20 17:12:16,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-20 17:12:16,609 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 565 transitions, 8117 flow [2024-06-20 17:12:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:16,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:16,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:12:16,609 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:16,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1232839761, now seen corresponding path program 16 times [2024-06-20 17:12:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181435235] [2024-06-20 17:12:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:19,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181435235] [2024-06-20 17:12:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181435235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:19,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:19,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:19,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108014793] [2024-06-20 17:12:19,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:19,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:19,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:19,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 565 transitions, 8117 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:19,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:19,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:19,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:22,153 INFO L124 PetriNetUnfolderBase]: 3310/5416 cut-off events. [2024-06-20 17:12:22,153 INFO L125 PetriNetUnfolderBase]: For 708148/708154 co-relation queries the response was YES. [2024-06-20 17:12:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42838 conditions, 5416 events. 3310/5416 cut-off events. For 708148/708154 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34136 event pairs, 644 based on Foata normal form. 2/5410 useless extension candidates. Maximal degree in co-relation 42655. Up to 4568 conditions per place. [2024-06-20 17:12:22,243 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 214 changer transitions 0/601 dead transitions. [2024-06-20 17:12:22,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 601 transitions, 10405 flow [2024-06-20 17:12:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:12:22,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 17:12:22,245 INFO L175 Difference]: Start difference. First operand has 435 places, 565 transitions, 8117 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:12:22,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 601 transitions, 10405 flow [2024-06-20 17:12:25,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 601 transitions, 9497 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-20 17:12:25,882 INFO L231 Difference]: Finished difference. Result has 435 places, 571 transitions, 7787 flow [2024-06-20 17:12:25,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7251, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7787, PETRI_PLACES=435, PETRI_TRANSITIONS=571} [2024-06-20 17:12:25,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-20 17:12:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 571 transitions, 7787 flow [2024-06-20 17:12:25,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:25,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:25,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:25,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:12:25,883 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 62103859, now seen corresponding path program 17 times [2024-06-20 17:12:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:25,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105874457] [2024-06-20 17:12:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:25,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:28,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:28,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105874457] [2024-06-20 17:12:28,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105874457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:28,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349850820] [2024-06-20 17:12:28,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:28,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:29,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:29,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 571 transitions, 7787 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:29,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:29,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:29,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:31,350 INFO L124 PetriNetUnfolderBase]: 3315/5429 cut-off events. [2024-06-20 17:12:31,350 INFO L125 PetriNetUnfolderBase]: For 715577/715583 co-relation queries the response was YES. [2024-06-20 17:12:31,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42556 conditions, 5429 events. 3315/5429 cut-off events. For 715577/715583 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34382 event pairs, 646 based on Foata normal form. 2/5423 useless extension candidates. Maximal degree in co-relation 42373. Up to 4574 conditions per place. [2024-06-20 17:12:31,426 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 239 changer transitions 0/598 dead transitions. [2024-06-20 17:12:31,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 598 transitions, 9528 flow [2024-06-20 17:12:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:12:31,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:12:31,428 INFO L175 Difference]: Start difference. First operand has 435 places, 571 transitions, 7787 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:12:31,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 598 transitions, 9528 flow [2024-06-20 17:12:34,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 598 transitions, 9066 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:34,772 INFO L231 Difference]: Finished difference. Result has 438 places, 574 transitions, 7860 flow [2024-06-20 17:12:34,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7860, PETRI_PLACES=438, PETRI_TRANSITIONS=574} [2024-06-20 17:12:34,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-20 17:12:34,772 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 574 transitions, 7860 flow [2024-06-20 17:12:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:34,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:34,773 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] [2024-06-20 17:12:34,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:12:34,773 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:34,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1219441255, now seen corresponding path program 9 times [2024-06-20 17:12:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:34,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173880872] [2024-06-20 17:12:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:34,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173880872] [2024-06-20 17:12:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173880872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:37,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153707761] [2024-06-20 17:12:37,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:37,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:37,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 574 transitions, 7860 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:37,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:37,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:37,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:40,069 INFO L124 PetriNetUnfolderBase]: 3309/5423 cut-off events. [2024-06-20 17:12:40,070 INFO L125 PetriNetUnfolderBase]: For 721636/721652 co-relation queries the response was YES. [2024-06-20 17:12:40,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42427 conditions, 5423 events. 3309/5423 cut-off events. For 721636/721652 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34342 event pairs, 625 based on Foata normal form. 16/5435 useless extension candidates. Maximal degree in co-relation 42243. Up to 4883 conditions per place. [2024-06-20 17:12:40,150 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 102 changer transitions 0/599 dead transitions. [2024-06-20 17:12:40,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 599 transitions, 9122 flow [2024-06-20 17:12:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:12:40,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:12:40,152 INFO L175 Difference]: Start difference. First operand has 438 places, 574 transitions, 7860 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:12:40,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 599 transitions, 9122 flow [2024-06-20 17:12:43,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 599 transitions, 8740 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:12:43,605 INFO L231 Difference]: Finished difference. Result has 441 places, 574 transitions, 7688 flow [2024-06-20 17:12:43,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7478, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7688, PETRI_PLACES=441, PETRI_TRANSITIONS=574} [2024-06-20 17:12:43,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-20 17:12:43,606 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 574 transitions, 7688 flow [2024-06-20 17:12:43,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:43,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:43,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:12:43,606 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:43,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash -48705353, now seen corresponding path program 10 times [2024-06-20 17:12:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030960186] [2024-06-20 17:12:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030960186] [2024-06-20 17:12:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030960186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:46,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:46,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491887346] [2024-06-20 17:12:46,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:46,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:46,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:46,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:46,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 574 transitions, 7688 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:46,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:46,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:49,180 INFO L124 PetriNetUnfolderBase]: 3303/5417 cut-off events. [2024-06-20 17:12:49,181 INFO L125 PetriNetUnfolderBase]: For 720815/720831 co-relation queries the response was YES. [2024-06-20 17:12:49,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41961 conditions, 5417 events. 3303/5417 cut-off events. For 720815/720831 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34251 event pairs, 618 based on Foata normal form. 16/5429 useless extension candidates. Maximal degree in co-relation 41776. Up to 4802 conditions per place. [2024-06-20 17:12:49,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 122 changer transitions 0/609 dead transitions. [2024-06-20 17:12:49,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 609 transitions, 9442 flow [2024-06-20 17:12:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:12:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:12:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-20 17:12:49,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-20 17:12:49,266 INFO L175 Difference]: Start difference. First operand has 441 places, 574 transitions, 7688 flow. Second operand 11 states and 181 transitions. [2024-06-20 17:12:49,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 609 transitions, 9442 flow [2024-06-20 17:12:52,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 609 transitions, 9210 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:12:52,714 INFO L231 Difference]: Finished difference. Result has 445 places, 574 transitions, 7706 flow [2024-06-20 17:12:52,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7706, PETRI_PLACES=445, PETRI_TRANSITIONS=574} [2024-06-20 17:12:52,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-20 17:12:52,715 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 574 transitions, 7706 flow [2024-06-20 17:12:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:52,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:12:52,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:12:52,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:12:52,715 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:12:52,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:12:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash -54366635, now seen corresponding path program 18 times [2024-06-20 17:12:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:12:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71358300] [2024-06-20 17:12:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:12:52,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:12:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:12:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:12:55,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:12:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71358300] [2024-06-20 17:12:55,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71358300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:12:55,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:12:55,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:12:55,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807566096] [2024-06-20 17:12:55,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:12:55,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:12:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:12:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:12:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:12:55,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:12:55,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 574 transitions, 7706 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:12:55,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:12:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:12:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:12:58,236 INFO L124 PetriNetUnfolderBase]: 3300/5401 cut-off events. [2024-06-20 17:12:58,237 INFO L125 PetriNetUnfolderBase]: For 720558/720564 co-relation queries the response was YES. [2024-06-20 17:12:58,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41961 conditions, 5401 events. 3300/5401 cut-off events. For 720558/720564 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34081 event pairs, 640 based on Foata normal form. 2/5395 useless extension candidates. Maximal degree in co-relation 41775. Up to 4555 conditions per place. [2024-06-20 17:12:58,325 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 224 changer transitions 0/607 dead transitions. [2024-06-20 17:12:58,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 607 transitions, 9678 flow [2024-06-20 17:12:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:12:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:12:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:12:58,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:12:58,327 INFO L175 Difference]: Start difference. First operand has 445 places, 574 transitions, 7706 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:12:58,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 607 transitions, 9678 flow [2024-06-20 17:13:01,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 607 transitions, 9268 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-20 17:13:01,759 INFO L231 Difference]: Finished difference. Result has 443 places, 574 transitions, 7750 flow [2024-06-20 17:13:01,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7296, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7750, PETRI_PLACES=443, PETRI_TRANSITIONS=574} [2024-06-20 17:13:01,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-20 17:13:01,760 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 574 transitions, 7750 flow [2024-06-20 17:13:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:01,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:01,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:01,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:13:01,760 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1227298821, now seen corresponding path program 19 times [2024-06-20 17:13:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:01,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526822822] [2024-06-20 17:13:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:04,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526822822] [2024-06-20 17:13:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526822822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:04,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055036419] [2024-06-20 17:13:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:05,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:05,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 574 transitions, 7750 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:05,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:05,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:05,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:07,237 INFO L124 PetriNetUnfolderBase]: 3310/5423 cut-off events. [2024-06-20 17:13:07,238 INFO L125 PetriNetUnfolderBase]: For 733608/733614 co-relation queries the response was YES. [2024-06-20 17:13:07,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42154 conditions, 5423 events. 3310/5423 cut-off events. For 733608/733614 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34282 event pairs, 640 based on Foata normal form. 2/5417 useless extension candidates. Maximal degree in co-relation 41968. Up to 4822 conditions per place. [2024-06-20 17:13:07,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 117 changer transitions 0/606 dead transitions. [2024-06-20 17:13:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 606 transitions, 9121 flow [2024-06-20 17:13:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:13:07,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:13:07,330 INFO L175 Difference]: Start difference. First operand has 443 places, 574 transitions, 7750 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:13:07,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 606 transitions, 9121 flow [2024-06-20 17:13:11,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 606 transitions, 8615 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:13:11,047 INFO L231 Difference]: Finished difference. Result has 444 places, 580 transitions, 7587 flow [2024-06-20 17:13:11,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7587, PETRI_PLACES=444, PETRI_TRANSITIONS=580} [2024-06-20 17:13:11,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-20 17:13:11,061 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 580 transitions, 7587 flow [2024-06-20 17:13:11,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:11,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:11,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:11,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:13:11,061 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:11,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1227299007, now seen corresponding path program 13 times [2024-06-20 17:13:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950239782] [2024-06-20 17:13:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:11,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950239782] [2024-06-20 17:13:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950239782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015323900] [2024-06-20 17:13:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:14,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:14,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 580 transitions, 7587 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:14,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:14,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:14,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:16,526 INFO L124 PetriNetUnfolderBase]: 3320/5433 cut-off events. [2024-06-20 17:13:16,526 INFO L125 PetriNetUnfolderBase]: For 751318/751324 co-relation queries the response was YES. [2024-06-20 17:13:16,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42039 conditions, 5433 events. 3320/5433 cut-off events. For 751318/751324 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 34342 event pairs, 640 based on Foata normal form. 3/5428 useless extension candidates. Maximal degree in co-relation 41852. Up to 4785 conditions per place. [2024-06-20 17:13:16,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 132 changer transitions 0/615 dead transitions. [2024-06-20 17:13:16,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 615 transitions, 9176 flow [2024-06-20 17:13:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:13:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:13:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-20 17:13:16,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-20 17:13:16,786 INFO L175 Difference]: Start difference. First operand has 444 places, 580 transitions, 7587 flow. Second operand 11 states and 179 transitions. [2024-06-20 17:13:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 615 transitions, 9176 flow [2024-06-20 17:13:20,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 615 transitions, 8922 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:13:20,213 INFO L231 Difference]: Finished difference. Result has 449 places, 583 transitions, 7658 flow [2024-06-20 17:13:20,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7333, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7658, PETRI_PLACES=449, PETRI_TRANSITIONS=583} [2024-06-20 17:13:20,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-20 17:13:20,214 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 583 transitions, 7658 flow [2024-06-20 17:13:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:20,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:20,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:13:20,214 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -542374525, now seen corresponding path program 20 times [2024-06-20 17:13:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834594581] [2024-06-20 17:13:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:23,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:23,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834594581] [2024-06-20 17:13:23,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834594581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:23,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:23,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:23,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332673935] [2024-06-20 17:13:23,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:23,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:23,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 583 transitions, 7658 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:23,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:23,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:23,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:25,930 INFO L124 PetriNetUnfolderBase]: 3317/5437 cut-off events. [2024-06-20 17:13:25,931 INFO L125 PetriNetUnfolderBase]: For 750342/750348 co-relation queries the response was YES. [2024-06-20 17:13:26,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42063 conditions, 5437 events. 3317/5437 cut-off events. For 750342/750348 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34387 event pairs, 644 based on Foata normal form. 2/5431 useless extension candidates. Maximal degree in co-relation 41875. Up to 4822 conditions per place. [2024-06-20 17:13:26,022 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 123 changer transitions 0/606 dead transitions. [2024-06-20 17:13:26,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 606 transitions, 9154 flow [2024-06-20 17:13:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:13:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:13:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:13:26,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:13:26,023 INFO L175 Difference]: Start difference. First operand has 449 places, 583 transitions, 7658 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:13:26,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 606 transitions, 9154 flow [2024-06-20 17:13:29,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 606 transitions, 8722 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-20 17:13:29,634 INFO L231 Difference]: Finished difference. Result has 448 places, 583 transitions, 7478 flow [2024-06-20 17:13:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7478, PETRI_PLACES=448, PETRI_TRANSITIONS=583} [2024-06-20 17:13:29,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-20 17:13:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 583 transitions, 7478 flow [2024-06-20 17:13:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:29,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:13:29,635 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:29,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -44986283, now seen corresponding path program 11 times [2024-06-20 17:13:29,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:29,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415969858] [2024-06-20 17:13:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:29,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:32,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:32,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415969858] [2024-06-20 17:13:32,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415969858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:32,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532212169] [2024-06-20 17:13:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:32,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:32,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 583 transitions, 7478 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:34,805 INFO L124 PetriNetUnfolderBase]: 3327/5461 cut-off events. [2024-06-20 17:13:34,806 INFO L125 PetriNetUnfolderBase]: For 768104/768120 co-relation queries the response was YES. [2024-06-20 17:13:34,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 5461 events. 3327/5461 cut-off events. For 768104/768120 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34678 event pairs, 623 based on Foata normal form. 16/5473 useless extension candidates. Maximal degree in co-relation 41662. Up to 4966 conditions per place. [2024-06-20 17:13:34,890 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 67 changer transitions 0/617 dead transitions. [2024-06-20 17:13:34,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 617 transitions, 9068 flow [2024-06-20 17:13:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:13:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:13:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-20 17:13:34,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-20 17:13:34,892 INFO L175 Difference]: Start difference. First operand has 448 places, 583 transitions, 7478 flow. Second operand 11 states and 174 transitions. [2024-06-20 17:13:34,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 617 transitions, 9068 flow [2024-06-20 17:13:38,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 617 transitions, 8736 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:13:38,654 INFO L231 Difference]: Finished difference. Result has 451 places, 586 transitions, 7332 flow [2024-06-20 17:13:38,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7332, PETRI_PLACES=451, PETRI_TRANSITIONS=586} [2024-06-20 17:13:38,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-20 17:13:38,655 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 586 transitions, 7332 flow [2024-06-20 17:13:38,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:38,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:13:38,656 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:38,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -44992049, now seen corresponding path program 14 times [2024-06-20 17:13:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022865853] [2024-06-20 17:13:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:38,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:42,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:42,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022865853] [2024-06-20 17:13:42,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022865853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:42,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:42,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052717958] [2024-06-20 17:13:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:42,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:42,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 586 transitions, 7332 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:42,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:42,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:42,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:44,091 INFO L124 PetriNetUnfolderBase]: 3337/5467 cut-off events. [2024-06-20 17:13:44,091 INFO L125 PetriNetUnfolderBase]: For 780055/780061 co-relation queries the response was YES. [2024-06-20 17:13:44,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41854 conditions, 5467 events. 3337/5467 cut-off events. For 780055/780061 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34668 event pairs, 641 based on Foata normal form. 3/5462 useless extension candidates. Maximal degree in co-relation 41665. Up to 4805 conditions per place. [2024-06-20 17:13:44,180 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 131 changer transitions 0/620 dead transitions. [2024-06-20 17:13:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 620 transitions, 9153 flow [2024-06-20 17:13:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:13:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:13:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-20 17:13:44,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:13:44,182 INFO L175 Difference]: Start difference. First operand has 451 places, 586 transitions, 7332 flow. Second operand 12 states and 192 transitions. [2024-06-20 17:13:44,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 620 transitions, 9153 flow [2024-06-20 17:13:48,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 620 transitions, 9007 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:13:48,174 INFO L231 Difference]: Finished difference. Result has 455 places, 589 transitions, 7495 flow [2024-06-20 17:13:48,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7495, PETRI_PLACES=455, PETRI_TRANSITIONS=589} [2024-06-20 17:13:48,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-20 17:13:48,174 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 589 transitions, 7495 flow [2024-06-20 17:13:48,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:48,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:48,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:13:48,175 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:48,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash -44992235, now seen corresponding path program 21 times [2024-06-20 17:13:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472184327] [2024-06-20 17:13:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:13:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:13:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:13:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472184327] [2024-06-20 17:13:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472184327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:13:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:13:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:13:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709488561] [2024-06-20 17:13:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:13:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:13:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:13:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:13:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:13:51,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:13:51,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 589 transitions, 7495 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:51,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:13:51,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:13:51,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:13:53,796 INFO L124 PetriNetUnfolderBase]: 3334/5461 cut-off events. [2024-06-20 17:13:53,796 INFO L125 PetriNetUnfolderBase]: For 778788/778794 co-relation queries the response was YES. [2024-06-20 17:13:53,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41976 conditions, 5461 events. 3334/5461 cut-off events. For 778788/778794 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34603 event pairs, 644 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 41786. Up to 4847 conditions per place. [2024-06-20 17:13:53,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 124 changer transitions 0/613 dead transitions. [2024-06-20 17:13:53,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 613 transitions, 8775 flow [2024-06-20 17:13:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:13:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:13:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-20 17:13:53,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-20 17:13:53,888 INFO L175 Difference]: Start difference. First operand has 455 places, 589 transitions, 7495 flow. Second operand 11 states and 173 transitions. [2024-06-20 17:13:53,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 613 transitions, 8775 flow [2024-06-20 17:13:57,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 613 transitions, 8422 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-20 17:13:57,805 INFO L231 Difference]: Finished difference. Result has 457 places, 589 transitions, 7396 flow [2024-06-20 17:13:57,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7142, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7396, PETRI_PLACES=457, PETRI_TRANSITIONS=589} [2024-06-20 17:13:57,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-20 17:13:57,805 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 589 transitions, 7396 flow [2024-06-20 17:13:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:13:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:13:57,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:13:57,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:13:57,806 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:13:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:13:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -44980889, now seen corresponding path program 15 times [2024-06-20 17:13:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:13:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027601014] [2024-06-20 17:13:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:13:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:13:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027601014] [2024-06-20 17:14:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027601014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:01,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:01,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:01,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237012375] [2024-06-20 17:14:01,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:01,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:01,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:01,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:01,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 589 transitions, 7396 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:01,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:01,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:01,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:03,302 INFO L124 PetriNetUnfolderBase]: 3328/5451 cut-off events. [2024-06-20 17:14:03,302 INFO L125 PetriNetUnfolderBase]: For 783581/783587 co-relation queries the response was YES. [2024-06-20 17:14:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41658 conditions, 5451 events. 3328/5451 cut-off events. For 783581/783587 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34540 event pairs, 639 based on Foata normal form. 3/5446 useless extension candidates. Maximal degree in co-relation 41467. Up to 4796 conditions per place. [2024-06-20 17:14:03,392 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 130 changer transitions 0/616 dead transitions. [2024-06-20 17:14:03,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 616 transitions, 8928 flow [2024-06-20 17:14:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:14:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:14:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 17:14:03,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 17:14:03,394 INFO L175 Difference]: Start difference. First operand has 457 places, 589 transitions, 7396 flow. Second operand 10 states and 166 transitions. [2024-06-20 17:14:03,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 616 transitions, 8928 flow [2024-06-20 17:14:07,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 616 transitions, 8640 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 17:14:07,055 INFO L231 Difference]: Finished difference. Result has 457 places, 589 transitions, 7374 flow [2024-06-20 17:14:07,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7374, PETRI_PLACES=457, PETRI_TRANSITIONS=589} [2024-06-20 17:14:07,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-20 17:14:07,056 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 589 transitions, 7374 flow [2024-06-20 17:14:07,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:07,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:07,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:07,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:14:07,056 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:07,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1332400371, now seen corresponding path program 12 times [2024-06-20 17:14:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246009117] [2024-06-20 17:14:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:10,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:10,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246009117] [2024-06-20 17:14:10,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246009117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:10,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960533895] [2024-06-20 17:14:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:10,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:10,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:10,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 589 transitions, 7374 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:10,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:10,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:10,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:12,529 INFO L124 PetriNetUnfolderBase]: 3322/5453 cut-off events. [2024-06-20 17:14:12,529 INFO L125 PetriNetUnfolderBase]: For 780982/780998 co-relation queries the response was YES. [2024-06-20 17:14:12,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41472 conditions, 5453 events. 3322/5453 cut-off events. For 780982/780998 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34685 event pairs, 622 based on Foata normal form. 16/5465 useless extension candidates. Maximal degree in co-relation 41280. Up to 4963 conditions per place. [2024-06-20 17:14:12,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 67 changer transitions 0/620 dead transitions. [2024-06-20 17:14:12,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 620 transitions, 8690 flow [2024-06-20 17:14:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:14:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:14:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-20 17:14:12,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 17:14:12,621 INFO L175 Difference]: Start difference. First operand has 457 places, 589 transitions, 7374 flow. Second operand 12 states and 184 transitions. [2024-06-20 17:14:12,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 620 transitions, 8690 flow [2024-06-20 17:14:16,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 620 transitions, 8414 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 17:14:16,575 INFO L231 Difference]: Finished difference. Result has 460 places, 589 transitions, 7238 flow [2024-06-20 17:14:16,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7238, PETRI_PLACES=460, PETRI_TRANSITIONS=589} [2024-06-20 17:14:16,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-20 17:14:16,589 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 589 transitions, 7238 flow [2024-06-20 17:14:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:16,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:16,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:14:16,589 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:14:16,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -653058705, now seen corresponding path program 13 times [2024-06-20 17:14:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:16,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325767729] [2024-06-20 17:14:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:19,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:19,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325767729] [2024-06-20 17:14:19,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325767729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:19,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:19,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:14:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213241917] [2024-06-20 17:14:19,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:14:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:14:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:14:19,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:14:19,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 589 transitions, 7238 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:14:19,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:19,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:14:19,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15