./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021.opt.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/mix021.opt.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/mix021.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix021.opt.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 16:01:31,808 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:01:31,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:01:31,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:01:31,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:01:31,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:01:31,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:01:31,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:01:31,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:01:31,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:01:31,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:01:31,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:01:31,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:01:31,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:01:31,917 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:01:31,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:01:31,918 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:01:31,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:01:31,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:01:31,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:01:31,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:01:31,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:01:31,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:01:31,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:01:31,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:01:31,926 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:01:31,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:01:31,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:01:31,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:01:31,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:01:31,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:01:31,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:01:31,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:01:31,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:01:31,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:01:31,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:01:31,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:01:32,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:01:32,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:01:32,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:01:32,172 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:01:32,173 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:01:32,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021.opt.i [2024-06-20 16:01:33,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:01:33,513 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:01:33,514 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021.opt.i [2024-06-20 16:01:33,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08d6ab80/49b38a9402fa4fa3a36d8d2026312268/FLAG122ef5b6a [2024-06-20 16:01:33,538 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08d6ab80/49b38a9402fa4fa3a36d8d2026312268 [2024-06-20 16:01:33,540 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:01:33,540 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:01:33,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix021.opt.yml/witness.yml [2024-06-20 16:01:33,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:01:33,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:01:33,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:01:33,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:01:33,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:01:33,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:01:33" (1/2) ... [2024-06-20 16:01:33,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f146afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:33, skipping insertion in model container [2024-06-20 16:01:33,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:01:33" (1/2) ... [2024-06-20 16:01:33,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@657a32c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:33, skipping insertion in model container [2024-06-20 16:01:33,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:33" (2/2) ... [2024-06-20 16:01:33,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f146afc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:01:33, skipping insertion in model container [2024-06-20 16:01:33,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:33" (2/2) ... [2024-06-20 16:01:33,688 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:01:33,780 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:01:33,781 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-20 16:01:33,782 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-20 16:01:33,782 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-20 16:01:33,782 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-20 16:01:33,783 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:01:33,783 INFO L106 edCorrectnessWitness]: ghost_update [L863-L863] multithreaded = 1; [2024-06-20 16:01:33,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:01:34,175 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:01:34,184 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:01:34,315 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:01:34,362 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:01:34,363 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:01:34 WrapperNode [2024-06-20 16:01:34,363 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:01:34,364 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:01:34,364 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:01:34,364 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:01:34,369 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,381 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,408 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 160 [2024-06-20 16:01:34,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:01:34,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:01:34,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:01:34,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:01:34,417 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,418 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,421 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,434 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:01:34,434 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,434 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,443 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,444 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,446 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,447 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:01:34,450 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:01:34,450 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:01:34,450 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:01:34,451 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 04:01:34" (1/1) ... [2024-06-20 16:01:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:01:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:01:34,503 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 16:01:34,556 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 16:01:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:01:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:01:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:01:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:01:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:01:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:01:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:01:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:01:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:01:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:01:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:01:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:01:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:01:34,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:01:34,576 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 16:01:34,706 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:01:34,708 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:01:34,999 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:01:34,999 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:01:35,170 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:01:35,171 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:01:35,171 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:01:35 BoogieIcfgContainer [2024-06-20 16:01:35,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:01:35,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:01:35,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:01:35,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:01:35,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:01:33" (1/4) ... [2024-06-20 16:01:35,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e1fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:01:35, skipping insertion in model container [2024-06-20 16:01:35,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:33" (2/4) ... [2024-06-20 16:01:35,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e1fbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:01:35, skipping insertion in model container [2024-06-20 16:01:35,177 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 04:01:34" (3/4) ... [2024-06-20 16:01:35,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e1fbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:01:35, skipping insertion in model container [2024-06-20 16:01:35,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:01:35" (4/4) ... [2024-06-20 16:01:35,179 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021.opt.i [2024-06-20 16:01:35,191 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:01:35,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:01:35,191 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:01:35,237 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:01:35,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:01:35,299 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 16:01:35,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:01:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:01:35,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:01:35,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 16:01:35,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:01:35,358 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;@11e24405, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:01:35,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:01:35,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:01:35,364 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:01:35,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:01:35,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:35,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:01:35,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:35,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash 413024472, now seen corresponding path program 1 times [2024-06-20 16:01:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417889292] [2024-06-20 16:01:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:36,390 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 16:01:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:36,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417889292] [2024-06-20 16:01:36,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417889292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:36,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:01:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469595104] [2024-06-20 16:01:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:36,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:01:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:01:36,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:01:36,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-20 16:01:36,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:36,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:36,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-20 16:01:36,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:37,776 INFO L124 PetriNetUnfolderBase]: 7892/11107 cut-off events. [2024-06-20 16:01:37,776 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-20 16:01:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22184 conditions, 11107 events. 7892/11107 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 61593 event pairs, 6010 based on Foata normal form. 1/10744 useless extension candidates. Maximal degree in co-relation 22171. Up to 10748 conditions per place. [2024-06-20 16:01:37,837 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-20 16:01:37,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-20 16:01:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:01:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:01:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-20 16:01:37,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-20 16:01:37,848 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-20 16:01:37,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-20 16:01:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:37,855 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 16:01:37,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:01:37,859 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 16:01:37,859 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 16:01:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:37,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:37,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:01:37,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:37,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1779562167, now seen corresponding path program 1 times [2024-06-20 16:01:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471367020] [2024-06-20 16:01:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:38,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471367020] [2024-06-20 16:01:38,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471367020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:38,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:01:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002162854] [2024-06-20 16:01:38,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:01:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:01:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:01:38,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:01:38,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:01:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:39,840 INFO L124 PetriNetUnfolderBase]: 9032/12426 cut-off events. [2024-06-20 16:01:39,840 INFO L125 PetriNetUnfolderBase]: For 2463/2463 co-relation queries the response was YES. [2024-06-20 16:01:39,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28339 conditions, 12426 events. 9032/12426 cut-off events. For 2463/2463 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 66993 event pairs, 6162 based on Foata normal form. 4/12376 useless extension candidates. Maximal degree in co-relation 28327. Up to 12238 conditions per place. [2024-06-20 16:01:39,979 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-20 16:01:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-20 16:01:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:01:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:01:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-20 16:01:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-20 16:01:39,984 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-06-20 16:01:39,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-20 16:01:39,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:01:39,988 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 16:01:39,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-20 16:01:39,989 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 16:01:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 16:01:39,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:39,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:39,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:39,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:01:39,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:39,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash -668146491, now seen corresponding path program 1 times [2024-06-20 16:01:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:39,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457596842] [2024-06-20 16:01:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:40,687 INFO 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 16:01:40,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457596842] [2024-06-20 16:01:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457596842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:40,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:01:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252611479] [2024-06-20 16:01:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:01:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:01:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:01:40,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:01:40,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:40,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:40,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:01:40,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:42,044 INFO L124 PetriNetUnfolderBase]: 9050/12517 cut-off events. [2024-06-20 16:01:42,044 INFO L125 PetriNetUnfolderBase]: For 7147/7147 co-relation queries the response was YES. [2024-06-20 16:01:42,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31772 conditions, 12517 events. 9050/12517 cut-off events. For 7147/7147 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68167 event pairs, 4826 based on Foata normal form. 7/12503 useless extension candidates. Maximal degree in co-relation 31758. Up to 12159 conditions per place. [2024-06-20 16:01:42,107 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-20 16:01:42,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 537 flow [2024-06-20 16:01:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:01:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:01:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-20 16:01:42,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-20 16:01:42,112 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 165 transitions. [2024-06-20 16:01:42,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 537 flow [2024-06-20 16:01:42,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:01:42,118 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-20 16:01:42,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-20 16:01:42,119 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-20 16:01:42,119 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-20 16:01:42,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:42,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:42,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:42,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:01:42,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:42,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1293318280, now seen corresponding path program 1 times [2024-06-20 16:01:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:42,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265616641] [2024-06-20 16:01:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:42,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:42,855 INFO 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 16:01:42,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:42,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265616641] [2024-06-20 16:01:42,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265616641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:42,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:42,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:01:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579926290] [2024-06-20 16:01:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:01:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:01:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:01:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:01:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:01:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:44,120 INFO L124 PetriNetUnfolderBase]: 9079/12561 cut-off events. [2024-06-20 16:01:44,121 INFO L125 PetriNetUnfolderBase]: For 16942/16948 co-relation queries the response was YES. [2024-06-20 16:01:44,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37267 conditions, 12561 events. 9079/12561 cut-off events. For 16942/16948 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68384 event pairs, 3910 based on Foata normal form. 18/12558 useless extension candidates. Maximal degree in co-relation 37250. Up to 12124 conditions per place. [2024-06-20 16:01:44,173 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 78 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-20 16:01:44,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 682 flow [2024-06-20 16:01:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:01:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:01:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-20 16:01:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-20 16:01:44,175 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 191 transitions. [2024-06-20 16:01:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 682 flow [2024-06-20 16:01:44,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:01:44,181 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-20 16:01:44,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-20 16:01:44,182 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-20 16:01:44,182 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-20 16:01:44,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:44,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:44,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:01:44,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:44,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1553418920, now seen corresponding path program 1 times [2024-06-20 16:01:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:44,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053278375] [2024-06-20 16:01:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:44,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053278375] [2024-06-20 16:01:44,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053278375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:44,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:01:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242163347] [2024-06-20 16:01:44,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:01:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:01:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:01:44,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:01:44,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:44,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:44,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:01:44,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:46,060 INFO L124 PetriNetUnfolderBase]: 7920/11223 cut-off events. [2024-06-20 16:01:46,060 INFO L125 PetriNetUnfolderBase]: For 21720/21720 co-relation queries the response was YES. [2024-06-20 16:01:46,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36139 conditions, 11223 events. 7920/11223 cut-off events. For 21720/21720 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 63094 event pairs, 4036 based on Foata normal form. 3/11061 useless extension candidates. Maximal degree in co-relation 36118. Up to 10775 conditions per place. [2024-06-20 16:01:46,120 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-20 16:01:46,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 583 flow [2024-06-20 16:01:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:01:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:01:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 16:01:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-20 16:01:46,121 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 131 transitions. [2024-06-20 16:01:46,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 583 flow [2024-06-20 16:01:46,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 514 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:46,131 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 349 flow [2024-06-20 16:01:46,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-20 16:01:46,134 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-20 16:01:46,134 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 349 flow [2024-06-20 16:01:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:46,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:46,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:01:46,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:46,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 903015460, now seen corresponding path program 1 times [2024-06-20 16:01:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148337973] [2024-06-20 16:01:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:46,921 INFO 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 16:01:46,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148337973] [2024-06-20 16:01:46,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148337973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:46,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:46,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:01:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470529229] [2024-06-20 16:01:46,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:01:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:01:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:01:46,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:01:46,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 16:01:46,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:46,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:01:46,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:48,702 INFO L124 PetriNetUnfolderBase]: 7953/11429 cut-off events. [2024-06-20 16:01:48,702 INFO L125 PetriNetUnfolderBase]: For 25760/25760 co-relation queries the response was YES. [2024-06-20 16:01:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36958 conditions, 11429 events. 7953/11429 cut-off events. For 25760/25760 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65298 event pairs, 3830 based on Foata normal form. 7/11411 useless extension candidates. Maximal degree in co-relation 36935. Up to 10689 conditions per place. [2024-06-20 16:01:48,748 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-20 16:01:48,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 757 flow [2024-06-20 16:01:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:01:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:01:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 16:01:48,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-20 16:01:48,749 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 349 flow. Second operand 6 states and 167 transitions. [2024-06-20 16:01:48,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 757 flow [2024-06-20 16:01:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 728 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:48,758 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 494 flow [2024-06-20 16:01:48,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-20 16:01:48,759 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-20 16:01:48,759 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 494 flow [2024-06-20 16:01:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 16:01:48,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:48,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:01:48,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:48,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -803369445, now seen corresponding path program 1 times [2024-06-20 16:01:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732643533] [2024-06-20 16:01:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:49,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732643533] [2024-06-20 16:01:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732643533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:01:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7161029] [2024-06-20 16:01:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:01:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:01:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:01:49,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:01:49,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:49,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:49,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:01:49,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:51,014 INFO L124 PetriNetUnfolderBase]: 9116/12616 cut-off events. [2024-06-20 16:01:51,015 INFO L125 PetriNetUnfolderBase]: For 45375/45387 co-relation queries the response was YES. [2024-06-20 16:01:51,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46730 conditions, 12616 events. 9116/12616 cut-off events. For 45375/45387 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68179 event pairs, 4510 based on Foata normal form. 14/12615 useless extension candidates. Maximal degree in co-relation 46705. Up to 12246 conditions per place. [2024-06-20 16:01:51,080 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-20 16:01:51,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 853 flow [2024-06-20 16:01:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:01:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:01:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 16:01:51,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-20 16:01:51,082 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 494 flow. Second operand 6 states and 161 transitions. [2024-06-20 16:01:51,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 853 flow [2024-06-20 16:01:51,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 829 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-20 16:01:51,103 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 566 flow [2024-06-20 16:01:51,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-20 16:01:51,104 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-20 16:01:51,105 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 566 flow [2024-06-20 16:01:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:51,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:51,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:51,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:01:51,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:51,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1813010681, now seen corresponding path program 2 times [2024-06-20 16:01:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:51,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32543022] [2024-06-20 16:01:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:51,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:51,819 INFO 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 16:01:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32543022] [2024-06-20 16:01:51,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32543022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:51,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:51,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:01:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31475712] [2024-06-20 16:01:51,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:01:51,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:01:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:01:51,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:01:51,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 566 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:51,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:51,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:01:51,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:53,398 INFO L124 PetriNetUnfolderBase]: 9092/12568 cut-off events. [2024-06-20 16:01:53,399 INFO L125 PetriNetUnfolderBase]: For 50462/50468 co-relation queries the response was YES. [2024-06-20 16:01:53,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47123 conditions, 12568 events. 9092/12568 cut-off events. For 50462/50468 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68090 event pairs, 4530 based on Foata normal form. 4/12550 useless extension candidates. Maximal degree in co-relation 47095. Up to 12216 conditions per place. [2024-06-20 16:01:53,462 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 76 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-20 16:01:53,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 832 flow [2024-06-20 16:01:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:01:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:01:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 16:01:53,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:01:53,463 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 566 flow. Second operand 6 states and 156 transitions. [2024-06-20 16:01:53,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 832 flow [2024-06-20 16:01:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 789 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:53,483 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 586 flow [2024-06-20 16:01:53,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-20 16:01:53,484 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-20 16:01:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 586 flow [2024-06-20 16:01:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:53,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:53,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:53,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:01:53,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:53,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash 330617189, now seen corresponding path program 1 times [2024-06-20 16:01:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637834511] [2024-06-20 16:01:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:54,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:54,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637834511] [2024-06-20 16:01:54,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637834511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:54,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:54,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406672892] [2024-06-20 16:01:54,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:54,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:54,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:01:54,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:54,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:54,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:01:54,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:55,911 INFO L124 PetriNetUnfolderBase]: 9902/13740 cut-off events. [2024-06-20 16:01:55,911 INFO L125 PetriNetUnfolderBase]: For 64016/64022 co-relation queries the response was YES. [2024-06-20 16:01:55,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52889 conditions, 13740 events. 9902/13740 cut-off events. For 64016/64022 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 74875 event pairs, 3695 based on Foata normal form. 15/13737 useless extension candidates. Maximal degree in co-relation 52860. Up to 12138 conditions per place. [2024-06-20 16:01:55,984 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 127 selfloop transitions, 59 changer transitions 0/193 dead transitions. [2024-06-20 16:01:55,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 193 transitions, 1682 flow [2024-06-20 16:01:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-20 16:01:55,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 16:01:55,989 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 586 flow. Second operand 8 states and 234 transitions. [2024-06-20 16:01:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 193 transitions, 1682 flow [2024-06-20 16:01:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1519 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:56,029 INFO L231 Difference]: Finished difference. Result has 85 places, 121 transitions, 937 flow [2024-06-20 16:01:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=85, PETRI_TRANSITIONS=121} [2024-06-20 16:01:56,030 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-20 16:01:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 121 transitions, 937 flow [2024-06-20 16:01:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:56,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:01:56,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:56,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 37120805, now seen corresponding path program 2 times [2024-06-20 16:01:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:56,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992592697] [2024-06-20 16:01:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:56,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992592697] [2024-06-20 16:01:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992592697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:56,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:56,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485392047] [2024-06-20 16:01:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:56,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:56,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:56,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:01:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 121 transitions, 937 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:56,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:56,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:01:56,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:58,872 INFO L124 PetriNetUnfolderBase]: 10518/14713 cut-off events. [2024-06-20 16:01:58,872 INFO L125 PetriNetUnfolderBase]: For 95106/95118 co-relation queries the response was YES. [2024-06-20 16:01:58,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65157 conditions, 14713 events. 10518/14713 cut-off events. For 95106/95118 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 82033 event pairs, 4002 based on Foata normal form. 31/14726 useless extension candidates. Maximal degree in co-relation 65124. Up to 12540 conditions per place. [2024-06-20 16:01:58,975 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 105 selfloop transitions, 81 changer transitions 0/193 dead transitions. [2024-06-20 16:01:58,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 193 transitions, 1821 flow [2024-06-20 16:01:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-20 16:01:58,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521978021978022 [2024-06-20 16:01:58,978 INFO L175 Difference]: Start difference. First operand has 85 places, 121 transitions, 937 flow. Second operand 7 states and 201 transitions. [2024-06-20 16:01:58,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 193 transitions, 1821 flow [2024-06-20 16:01:59,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 193 transitions, 1727 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 16:01:59,063 INFO L231 Difference]: Finished difference. Result has 92 places, 142 transitions, 1310 flow [2024-06-20 16:01:59,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1310, PETRI_PLACES=92, PETRI_TRANSITIONS=142} [2024-06-20 16:01:59,064 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-20 16:01:59,064 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 142 transitions, 1310 flow [2024-06-20 16:01:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:59,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:59,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:59,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:01:59,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:01:59,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -368755197, now seen corresponding path program 3 times [2024-06-20 16:01:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:59,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997919913] [2024-06-20 16:01:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:59,974 INFO 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 16:01:59,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:59,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997919913] [2024-06-20 16:01:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997919913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:59,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465609935] [2024-06-20 16:01:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:59,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:00,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:00,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 142 transitions, 1310 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:00,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:00,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:00,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:02,270 INFO L124 PetriNetUnfolderBase]: 10642/14901 cut-off events. [2024-06-20 16:02:02,271 INFO L125 PetriNetUnfolderBase]: For 125563/125579 co-relation queries the response was YES. [2024-06-20 16:02:02,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72563 conditions, 14901 events. 10642/14901 cut-off events. For 125563/125579 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83061 event pairs, 4078 based on Foata normal form. 16/14878 useless extension candidates. Maximal degree in co-relation 72526. Up to 12612 conditions per place. [2024-06-20 16:02:02,398 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 109 selfloop transitions, 93 changer transitions 0/209 dead transitions. [2024-06-20 16:02:02,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 209 transitions, 2266 flow [2024-06-20 16:02:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:02,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-20 16:02:02,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-20 16:02:02,400 INFO L175 Difference]: Start difference. First operand has 92 places, 142 transitions, 1310 flow. Second operand 7 states and 199 transitions. [2024-06-20 16:02:02,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 209 transitions, 2266 flow [2024-06-20 16:02:02,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 209 transitions, 2139 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:02,546 INFO L231 Difference]: Finished difference. Result has 97 places, 158 transitions, 1593 flow [2024-06-20 16:02:02,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1593, PETRI_PLACES=97, PETRI_TRANSITIONS=158} [2024-06-20 16:02:02,547 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-20 16:02:02,547 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 158 transitions, 1593 flow [2024-06-20 16:02:02,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:02,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:02,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:02,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:02:02,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:02,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 214489475, now seen corresponding path program 4 times [2024-06-20 16:02:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:02,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012163005] [2024-06-20 16:02:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012163005] [2024-06-20 16:02:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012163005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:03,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146309002] [2024-06-20 16:02:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:03,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:03,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:03,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:03,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 158 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:03,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:03,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:03,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:05,364 INFO L124 PetriNetUnfolderBase]: 10688/14966 cut-off events. [2024-06-20 16:02:05,364 INFO L125 PetriNetUnfolderBase]: For 156952/156978 co-relation queries the response was YES. [2024-06-20 16:02:05,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76783 conditions, 14966 events. 10688/14966 cut-off events. For 156952/156978 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83356 event pairs, 3993 based on Foata normal form. 24/14951 useless extension candidates. Maximal degree in co-relation 76744. Up to 12645 conditions per place. [2024-06-20 16:02:05,485 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 99 selfloop transitions, 108 changer transitions 0/214 dead transitions. [2024-06-20 16:02:05,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 214 transitions, 2426 flow [2024-06-20 16:02:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-20 16:02:05,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-20 16:02:05,487 INFO L175 Difference]: Start difference. First operand has 97 places, 158 transitions, 1593 flow. Second operand 7 states and 197 transitions. [2024-06-20 16:02:05,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 214 transitions, 2426 flow [2024-06-20 16:02:05,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 214 transitions, 2231 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:05,649 INFO L231 Difference]: Finished difference. Result has 101 places, 166 transitions, 1746 flow [2024-06-20 16:02:05,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=101, PETRI_TRANSITIONS=166} [2024-06-20 16:02:05,649 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 16:02:05,649 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 166 transitions, 1746 flow [2024-06-20 16:02:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:05,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:02:05,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:05,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 214498403, now seen corresponding path program 1 times [2024-06-20 16:02:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:05,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356488598] [2024-06-20 16:02:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:06,464 INFO 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 16:02:06,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356488598] [2024-06-20 16:02:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356488598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:06,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327968759] [2024-06-20 16:02:06,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:06,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:02:06,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 166 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:06,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:06,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:02:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:08,344 INFO L124 PetriNetUnfolderBase]: 9684/13992 cut-off events. [2024-06-20 16:02:08,344 INFO L125 PetriNetUnfolderBase]: For 147406/147408 co-relation queries the response was YES. [2024-06-20 16:02:08,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71043 conditions, 13992 events. 9684/13992 cut-off events. For 147406/147408 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 81462 event pairs, 3652 based on Foata normal form. 26/13987 useless extension candidates. Maximal degree in co-relation 71002. Up to 12811 conditions per place. [2024-06-20 16:02:08,453 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 179 selfloop transitions, 25 changer transitions 0/212 dead transitions. [2024-06-20 16:02:08,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 212 transitions, 2420 flow [2024-06-20 16:02:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-20 16:02:08,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-20 16:02:08,455 INFO L175 Difference]: Start difference. First operand has 101 places, 166 transitions, 1746 flow. Second operand 7 states and 196 transitions. [2024-06-20 16:02:08,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 212 transitions, 2420 flow [2024-06-20 16:02:08,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 212 transitions, 2230 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:08,616 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1663 flow [2024-06-20 16:02:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1663, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-20 16:02:08,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-20 16:02:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1663 flow [2024-06-20 16:02:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:08,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:02:08,617 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -281310508, now seen corresponding path program 1 times [2024-06-20 16:02:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069080300] [2024-06-20 16:02:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:09,328 INFO 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 16:02:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:09,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069080300] [2024-06-20 16:02:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069080300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:09,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:09,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:09,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634391740] [2024-06-20 16:02:09,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:09,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:09,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:02:09,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1663 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:02:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:10,921 INFO L124 PetriNetUnfolderBase]: 9670/13972 cut-off events. [2024-06-20 16:02:10,921 INFO L125 PetriNetUnfolderBase]: For 157964/157966 co-relation queries the response was YES. [2024-06-20 16:02:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71481 conditions, 13972 events. 9670/13972 cut-off events. For 157964/157966 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 81298 event pairs, 3787 based on Foata normal form. 4/13957 useless extension candidates. Maximal degree in co-relation 71439. Up to 13102 conditions per place. [2024-06-20 16:02:11,046 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 165 selfloop transitions, 12 changer transitions 0/185 dead transitions. [2024-06-20 16:02:11,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 185 transitions, 2080 flow [2024-06-20 16:02:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 16:02:11,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:02:11,048 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1663 flow. Second operand 6 states and 143 transitions. [2024-06-20 16:02:11,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 185 transitions, 2080 flow [2024-06-20 16:02:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 185 transitions, 1995 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:11,217 INFO L231 Difference]: Finished difference. Result has 106 places, 171 transitions, 1637 flow [2024-06-20 16:02:11,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1637, PETRI_PLACES=106, PETRI_TRANSITIONS=171} [2024-06-20 16:02:11,218 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-20 16:02:11,218 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 171 transitions, 1637 flow [2024-06-20 16:02:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:11,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:11,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:11,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:02:11,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:11,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1150745835, now seen corresponding path program 1 times [2024-06-20 16:02:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339308626] [2024-06-20 16:02:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:12,008 INFO 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 16:02:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339308626] [2024-06-20 16:02:12,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339308626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:12,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:12,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:12,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75899050] [2024-06-20 16:02:12,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:12,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:12,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:12,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:12,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 171 transitions, 1637 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:12,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:12,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:12,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:14,112 INFO L124 PetriNetUnfolderBase]: 11096/15623 cut-off events. [2024-06-20 16:02:14,113 INFO L125 PetriNetUnfolderBase]: For 199956/199986 co-relation queries the response was YES. [2024-06-20 16:02:14,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81407 conditions, 15623 events. 11096/15623 cut-off events. For 199956/199986 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 88411 event pairs, 4066 based on Foata normal form. 37/15645 useless extension candidates. Maximal degree in co-relation 81363. Up to 13095 conditions per place. [2024-06-20 16:02:14,213 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 119 selfloop transitions, 114 changer transitions 0/240 dead transitions. [2024-06-20 16:02:14,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 240 transitions, 2733 flow [2024-06-20 16:02:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-20 16:02:14,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-20 16:02:14,215 INFO L175 Difference]: Start difference. First operand has 106 places, 171 transitions, 1637 flow. Second operand 7 states and 200 transitions. [2024-06-20 16:02:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 240 transitions, 2733 flow [2024-06-20 16:02:14,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 240 transitions, 2695 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:14,370 INFO L231 Difference]: Finished difference. Result has 111 places, 190 transitions, 2181 flow [2024-06-20 16:02:14,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2181, PETRI_PLACES=111, PETRI_TRANSITIONS=190} [2024-06-20 16:02:14,371 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-20 16:02:14,371 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 190 transitions, 2181 flow [2024-06-20 16:02:14,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:14,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:14,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:14,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:02:14,372 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:14,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1150740255, now seen corresponding path program 2 times [2024-06-20 16:02:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:14,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038671034] [2024-06-20 16:02:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038671034] [2024-06-20 16:02:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038671034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:15,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604967962] [2024-06-20 16:02:15,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:15,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:15,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 190 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:15,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:15,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:15,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:17,226 INFO L124 PetriNetUnfolderBase]: 11070/15586 cut-off events. [2024-06-20 16:02:17,227 INFO L125 PetriNetUnfolderBase]: For 235430/235452 co-relation queries the response was YES. [2024-06-20 16:02:17,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87411 conditions, 15586 events. 11070/15586 cut-off events. For 235430/235452 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 88076 event pairs, 4140 based on Foata normal form. 31/15602 useless extension candidates. Maximal degree in co-relation 87365. Up to 13081 conditions per place. [2024-06-20 16:02:17,390 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 120 selfloop transitions, 121 changer transitions 0/248 dead transitions. [2024-06-20 16:02:17,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 248 transitions, 3169 flow [2024-06-20 16:02:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-20 16:02:17,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-20 16:02:17,392 INFO L175 Difference]: Start difference. First operand has 111 places, 190 transitions, 2181 flow. Second operand 7 states and 203 transitions. [2024-06-20 16:02:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 248 transitions, 3169 flow [2024-06-20 16:02:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 248 transitions, 2979 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:17,795 INFO L231 Difference]: Finished difference. Result has 117 places, 197 transitions, 2487 flow [2024-06-20 16:02:17,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2487, PETRI_PLACES=117, PETRI_TRANSITIONS=197} [2024-06-20 16:02:17,797 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-20 16:02:17,797 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 197 transitions, 2487 flow [2024-06-20 16:02:17,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:17,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:17,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:02:17,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:17,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1460843311, now seen corresponding path program 3 times [2024-06-20 16:02:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:17,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045755987] [2024-06-20 16:02:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:18,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045755987] [2024-06-20 16:02:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045755987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524215220] [2024-06-20 16:02:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:18,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:18,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:18,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 197 transitions, 2487 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:18,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:18,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:18,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:20,731 INFO L124 PetriNetUnfolderBase]: 11116/15646 cut-off events. [2024-06-20 16:02:20,731 INFO L125 PetriNetUnfolderBase]: For 267172/267279 co-relation queries the response was YES. [2024-06-20 16:02:20,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91399 conditions, 15646 events. 11116/15646 cut-off events. For 267172/267279 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 88562 event pairs, 4056 based on Foata normal form. 73/15648 useless extension candidates. Maximal degree in co-relation 91350. Up to 13129 conditions per place. [2024-06-20 16:02:20,866 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 115 selfloop transitions, 124 changer transitions 0/246 dead transitions. [2024-06-20 16:02:20,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 246 transitions, 3313 flow [2024-06-20 16:02:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-20 16:02:20,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-20 16:02:20,868 INFO L175 Difference]: Start difference. First operand has 117 places, 197 transitions, 2487 flow. Second operand 7 states and 191 transitions. [2024-06-20 16:02:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 246 transitions, 3313 flow [2024-06-20 16:02:21,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 246 transitions, 3138 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:21,216 INFO L231 Difference]: Finished difference. Result has 120 places, 206 transitions, 2728 flow [2024-06-20 16:02:21,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2728, PETRI_PLACES=120, PETRI_TRANSITIONS=206} [2024-06-20 16:02:21,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-20 16:02:21,217 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 206 transitions, 2728 flow [2024-06-20 16:02:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:21,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:21,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:02:21,218 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:21,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1349705266, now seen corresponding path program 1 times [2024-06-20 16:02:21,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046978814] [2024-06-20 16:02:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:21,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046978814] [2024-06-20 16:02:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046978814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:21,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:21,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:21,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663889629] [2024-06-20 16:02:21,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:21,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:21,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:22,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:22,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 206 transitions, 2728 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:22,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:22,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:22,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:23,950 INFO L124 PetriNetUnfolderBase]: 11152/15704 cut-off events. [2024-06-20 16:02:23,950 INFO L125 PetriNetUnfolderBase]: For 289374/289412 co-relation queries the response was YES. [2024-06-20 16:02:24,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92973 conditions, 15704 events. 11152/15704 cut-off events. For 289374/289412 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 88727 event pairs, 3354 based on Foata normal form. 38/15736 useless extension candidates. Maximal degree in co-relation 92923. Up to 14691 conditions per place. [2024-06-20 16:02:24,098 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 42 changer transitions 0/251 dead transitions. [2024-06-20 16:02:24,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 251 transitions, 3554 flow [2024-06-20 16:02:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 16:02:24,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-20 16:02:24,100 INFO L175 Difference]: Start difference. First operand has 120 places, 206 transitions, 2728 flow. Second operand 7 states and 185 transitions. [2024-06-20 16:02:24,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 251 transitions, 3554 flow [2024-06-20 16:02:24,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 251 transitions, 3342 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:24,690 INFO L231 Difference]: Finished difference. Result has 123 places, 212 transitions, 2732 flow [2024-06-20 16:02:24,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2732, PETRI_PLACES=123, PETRI_TRANSITIONS=212} [2024-06-20 16:02:24,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-20 16:02:24,691 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 212 transitions, 2732 flow [2024-06-20 16:02:24,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:24,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:24,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:02:24,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:24,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1197914504, now seen corresponding path program 2 times [2024-06-20 16:02:24,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:24,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231186856] [2024-06-20 16:02:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:25,427 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 16:02:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231186856] [2024-06-20 16:02:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231186856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:25,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:25,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:25,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612353131] [2024-06-20 16:02:25,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:25,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:25,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:25,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:25,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:25,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:25,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 212 transitions, 2732 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:25,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:27,533 INFO L124 PetriNetUnfolderBase]: 11137/15670 cut-off events. [2024-06-20 16:02:27,533 INFO L125 PetriNetUnfolderBase]: For 315194/315216 co-relation queries the response was YES. [2024-06-20 16:02:27,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93527 conditions, 15670 events. 11137/15670 cut-off events. For 315194/315216 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 88446 event pairs, 4006 based on Foata normal form. 22/15686 useless extension candidates. Maximal degree in co-relation 93475. Up to 14806 conditions per place. [2024-06-20 16:02:27,695 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 201 selfloop transitions, 41 changer transitions 0/249 dead transitions. [2024-06-20 16:02:27,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 249 transitions, 3342 flow [2024-06-20 16:02:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:02:27,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:02:27,697 INFO L175 Difference]: Start difference. First operand has 123 places, 212 transitions, 2732 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:02:27,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 249 transitions, 3342 flow [2024-06-20 16:02:28,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 249 transitions, 3208 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:28,181 INFO L231 Difference]: Finished difference. Result has 127 places, 212 transitions, 2692 flow [2024-06-20 16:02:28,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2692, PETRI_PLACES=127, PETRI_TRANSITIONS=212} [2024-06-20 16:02:28,181 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-20 16:02:28,182 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 212 transitions, 2692 flow [2024-06-20 16:02:28,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:28,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:28,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:02:28,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:28,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1313390372, now seen corresponding path program 1 times [2024-06-20 16:02:28,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:28,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108788867] [2024-06-20 16:02:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:29,081 INFO 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 16:02:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108788867] [2024-06-20 16:02:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108788867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:29,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:29,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053941937] [2024-06-20 16:02:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:29,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:29,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 212 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:29,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:29,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:29,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:31,579 INFO L124 PetriNetUnfolderBase]: 11945/16930 cut-off events. [2024-06-20 16:02:31,579 INFO L125 PetriNetUnfolderBase]: For 370382/370398 co-relation queries the response was YES. [2024-06-20 16:02:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100143 conditions, 16930 events. 11945/16930 cut-off events. For 370382/370398 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 98164 event pairs, 3919 based on Foata normal form. 127/17042 useless extension candidates. Maximal degree in co-relation 100089. Up to 13214 conditions per place. [2024-06-20 16:02:31,759 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 135 selfloop transitions, 133 changer transitions 0/275 dead transitions. [2024-06-20 16:02:31,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 275 transitions, 3712 flow [2024-06-20 16:02:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-20 16:02:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528846153846154 [2024-06-20 16:02:31,761 INFO L175 Difference]: Start difference. First operand has 127 places, 212 transitions, 2692 flow. Second operand 8 states and 230 transitions. [2024-06-20 16:02:31,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 275 transitions, 3712 flow [2024-06-20 16:02:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 275 transitions, 3618 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:32,202 INFO L231 Difference]: Finished difference. Result has 129 places, 215 transitions, 2952 flow [2024-06-20 16:02:32,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=129, PETRI_TRANSITIONS=215} [2024-06-20 16:02:32,203 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-20 16:02:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 215 transitions, 2952 flow [2024-06-20 16:02:32,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:32,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:32,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:32,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:02:32,203 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:32,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash 231558427, now seen corresponding path program 1 times [2024-06-20 16:02:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:32,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495809143] [2024-06-20 16:02:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:32,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:33,036 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 16:02:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495809143] [2024-06-20 16:02:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495809143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:33,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:33,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849262099] [2024-06-20 16:02:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:33,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:33,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:33,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:33,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:33,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 215 transitions, 2952 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:33,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:33,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:33,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:35,525 INFO L124 PetriNetUnfolderBase]: 12055/17049 cut-off events. [2024-06-20 16:02:35,525 INFO L125 PetriNetUnfolderBase]: For 391606/391610 co-relation queries the response was YES. [2024-06-20 16:02:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105962 conditions, 17049 events. 12055/17049 cut-off events. For 391606/391610 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 97818 event pairs, 4236 based on Foata normal form. 12/17048 useless extension candidates. Maximal degree in co-relation 105907. Up to 16261 conditions per place. [2024-06-20 16:02:35,681 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 216 selfloop transitions, 39 changer transitions 0/262 dead transitions. [2024-06-20 16:02:35,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 262 transitions, 4013 flow [2024-06-20 16:02:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 16:02:35,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-20 16:02:35,682 INFO L175 Difference]: Start difference. First operand has 129 places, 215 transitions, 2952 flow. Second operand 7 states and 173 transitions. [2024-06-20 16:02:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 262 transitions, 4013 flow [2024-06-20 16:02:36,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 262 transitions, 3687 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:36,259 INFO L231 Difference]: Finished difference. Result has 132 places, 232 transitions, 3036 flow [2024-06-20 16:02:36,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3036, PETRI_PLACES=132, PETRI_TRANSITIONS=232} [2024-06-20 16:02:36,259 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-20 16:02:36,259 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 232 transitions, 3036 flow [2024-06-20 16:02:36,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:36,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:36,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:02:36,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:36,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -261910748, now seen corresponding path program 2 times [2024-06-20 16:02:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:36,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311777501] [2024-06-20 16:02:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:37,145 INFO 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 16:02:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311777501] [2024-06-20 16:02:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311777501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:37,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:37,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62241184] [2024-06-20 16:02:37,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:37,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:37,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:37,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 232 transitions, 3036 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:37,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:37,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:37,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:40,180 INFO L124 PetriNetUnfolderBase]: 12252/17344 cut-off events. [2024-06-20 16:02:40,180 INFO L125 PetriNetUnfolderBase]: For 407328/407342 co-relation queries the response was YES. [2024-06-20 16:02:40,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105122 conditions, 17344 events. 12252/17344 cut-off events. For 407328/407342 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 100271 event pairs, 4036 based on Foata normal form. 30/17316 useless extension candidates. Maximal degree in co-relation 105064. Up to 14460 conditions per place. [2024-06-20 16:02:40,346 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 140 selfloop transitions, 144 changer transitions 0/291 dead transitions. [2024-06-20 16:02:40,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 291 transitions, 4108 flow [2024-06-20 16:02:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-20 16:02:40,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-20 16:02:40,351 INFO L175 Difference]: Start difference. First operand has 132 places, 232 transitions, 3036 flow. Second operand 8 states and 225 transitions. [2024-06-20 16:02:40,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 291 transitions, 4108 flow [2024-06-20 16:02:40,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 291 transitions, 3881 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:40,880 INFO L231 Difference]: Finished difference. Result has 136 places, 235 transitions, 3186 flow [2024-06-20 16:02:40,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3186, PETRI_PLACES=136, PETRI_TRANSITIONS=235} [2024-06-20 16:02:40,880 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-20 16:02:40,881 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 235 transitions, 3186 flow [2024-06-20 16:02:40,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:40,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:40,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:40,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:02:40,881 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -34009598, now seen corresponding path program 3 times [2024-06-20 16:02:40,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:40,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757280143] [2024-06-20 16:02:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:42,097 INFO 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 16:02:42,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:42,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757280143] [2024-06-20 16:02:42,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757280143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:42,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:42,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357934403] [2024-06-20 16:02:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:42,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:42,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:42,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:42,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 235 transitions, 3186 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:42,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:42,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:42,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:44,771 INFO L124 PetriNetUnfolderBase]: 12449/17633 cut-off events. [2024-06-20 16:02:44,771 INFO L125 PetriNetUnfolderBase]: For 453470/453492 co-relation queries the response was YES. [2024-06-20 16:02:44,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110397 conditions, 17633 events. 12449/17633 cut-off events. For 453470/453492 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 102174 event pairs, 3981 based on Foata normal form. 38/17613 useless extension candidates. Maximal degree in co-relation 110339. Up to 14755 conditions per place. [2024-06-20 16:02:44,958 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 152 changer transitions 0/293 dead transitions. [2024-06-20 16:02:44,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 293 transitions, 4192 flow [2024-06-20 16:02:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 16:02:44,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-20 16:02:44,959 INFO L175 Difference]: Start difference. First operand has 136 places, 235 transitions, 3186 flow. Second operand 8 states and 224 transitions. [2024-06-20 16:02:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 293 transitions, 4192 flow [2024-06-20 16:02:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 293 transitions, 3851 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:45,720 INFO L231 Difference]: Finished difference. Result has 138 places, 238 transitions, 3244 flow [2024-06-20 16:02:45,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3244, PETRI_PLACES=138, PETRI_TRANSITIONS=238} [2024-06-20 16:02:45,721 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-20 16:02:45,721 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 238 transitions, 3244 flow [2024-06-20 16:02:45,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:45,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:45,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:02:45,721 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:45,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash -25438718, now seen corresponding path program 4 times [2024-06-20 16:02:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045154879] [2024-06-20 16:02:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:45,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,632 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 16:02:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045154879] [2024-06-20 16:02:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045154879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345400591] [2024-06-20 16:02:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:46,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:46,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 238 transitions, 3244 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:46,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:46,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:49,866 INFO L124 PetriNetUnfolderBase]: 12595/17843 cut-off events. [2024-06-20 16:02:49,866 INFO L125 PetriNetUnfolderBase]: For 488329/488351 co-relation queries the response was YES. [2024-06-20 16:02:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113335 conditions, 17843 events. 12595/17843 cut-off events. For 488329/488351 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 103721 event pairs, 3612 based on Foata normal form. 38/17823 useless extension candidates. Maximal degree in co-relation 113276. Up to 13193 conditions per place. [2024-06-20 16:02:50,007 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 131 selfloop transitions, 163 changer transitions 0/301 dead transitions. [2024-06-20 16:02:50,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 301 transitions, 4296 flow [2024-06-20 16:02:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 16:02:50,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-20 16:02:50,023 INFO L175 Difference]: Start difference. First operand has 138 places, 238 transitions, 3244 flow. Second operand 8 states and 229 transitions. [2024-06-20 16:02:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 301 transitions, 4296 flow [2024-06-20 16:02:50,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 301 transitions, 3933 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:50,730 INFO L231 Difference]: Finished difference. Result has 140 places, 241 transitions, 3305 flow [2024-06-20 16:02:50,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3305, PETRI_PLACES=140, PETRI_TRANSITIONS=241} [2024-06-20 16:02:50,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-20 16:02:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 241 transitions, 3305 flow [2024-06-20 16:02:50,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:50,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:50,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:50,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:02:50,732 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 243562867, now seen corresponding path program 2 times [2024-06-20 16:02:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728342613] [2024-06-20 16:02:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:51,582 INFO 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 16:02:51,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728342613] [2024-06-20 16:02:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728342613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455334311] [2024-06-20 16:02:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:51,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:51,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 241 transitions, 3305 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:51,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:51,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:54,572 INFO L124 PetriNetUnfolderBase]: 12573/17774 cut-off events. [2024-06-20 16:02:54,572 INFO L125 PetriNetUnfolderBase]: For 509520/509538 co-relation queries the response was YES. [2024-06-20 16:02:54,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114912 conditions, 17774 events. 12573/17774 cut-off events. For 509520/509538 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 102692 event pairs, 4347 based on Foata normal form. 18/17780 useless extension candidates. Maximal degree in co-relation 114852. Up to 17018 conditions per place. [2024-06-20 16:02:54,723 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 218 selfloop transitions, 40 changer transitions 0/265 dead transitions. [2024-06-20 16:02:54,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 265 transitions, 3997 flow [2024-06-20 16:02:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 16:02:54,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-06-20 16:02:54,725 INFO L175 Difference]: Start difference. First operand has 140 places, 241 transitions, 3305 flow. Second operand 7 states and 165 transitions. [2024-06-20 16:02:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 265 transitions, 3997 flow [2024-06-20 16:02:55,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 265 transitions, 3640 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:55,414 INFO L231 Difference]: Finished difference. Result has 142 places, 241 transitions, 3040 flow [2024-06-20 16:02:55,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3040, PETRI_PLACES=142, PETRI_TRANSITIONS=241} [2024-06-20 16:02:55,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-20 16:02:55,415 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 241 transitions, 3040 flow [2024-06-20 16:02:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:55,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:55,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:02:55,416 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:55,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash -601396621, now seen corresponding path program 3 times [2024-06-20 16:02:55,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:55,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626893232] [2024-06-20 16:02:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:56,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:56,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626893232] [2024-06-20 16:02:56,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626893232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:56,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:56,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563656321] [2024-06-20 16:02:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:56,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:56,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 241 transitions, 3040 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:56,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:56,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:56,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:58,781 INFO L124 PetriNetUnfolderBase]: 12579/17772 cut-off events. [2024-06-20 16:02:58,782 INFO L125 PetriNetUnfolderBase]: For 518919/518921 co-relation queries the response was YES. [2024-06-20 16:02:58,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111939 conditions, 17772 events. 12579/17772 cut-off events. For 518919/518921 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 102530 event pairs, 4399 based on Foata normal form. 6/17771 useless extension candidates. Maximal degree in co-relation 111878. Up to 17025 conditions per place. [2024-06-20 16:02:59,007 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 227 selfloop transitions, 49 changer transitions 0/283 dead transitions. [2024-06-20 16:02:59,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 283 transitions, 3805 flow [2024-06-20 16:02:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:02:59,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:02:59,009 INFO L175 Difference]: Start difference. First operand has 142 places, 241 transitions, 3040 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:02:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 283 transitions, 3805 flow [2024-06-20 16:02:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 283 transitions, 3713 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:59,634 INFO L231 Difference]: Finished difference. Result has 148 places, 251 transitions, 3222 flow [2024-06-20 16:02:59,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=148, PETRI_TRANSITIONS=251} [2024-06-20 16:02:59,634 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-20 16:02:59,634 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 251 transitions, 3222 flow [2024-06-20 16:02:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:59,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:59,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:02:59,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:59,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash 237105319, now seen corresponding path program 1 times [2024-06-20 16:02:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:59,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61815099] [2024-06-20 16:02:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:00,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61815099] [2024-06-20 16:03:00,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61815099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:00,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:00,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:03:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643797495] [2024-06-20 16:03:00,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:03:00,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:03:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:03:00,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:03:00,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 251 transitions, 3222 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:00,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:00,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:03:00,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:03,240 INFO L124 PetriNetUnfolderBase]: 11447/16611 cut-off events. [2024-06-20 16:03:03,241 INFO L125 PetriNetUnfolderBase]: For 475854/475854 co-relation queries the response was YES. [2024-06-20 16:03:03,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103317 conditions, 16611 events. 11447/16611 cut-off events. For 475854/475854 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 99730 event pairs, 3898 based on Foata normal form. 8/16549 useless extension candidates. Maximal degree in co-relation 103253. Up to 15515 conditions per place. [2024-06-20 16:03:03,438 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 245 selfloop transitions, 27 changer transitions 0/280 dead transitions. [2024-06-20 16:03:03,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 280 transitions, 4000 flow [2024-06-20 16:03:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:03:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:03:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:03:03,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-20 16:03:03,440 INFO L175 Difference]: Start difference. First operand has 148 places, 251 transitions, 3222 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:03:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 280 transitions, 4000 flow [2024-06-20 16:03:04,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 280 transitions, 3726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:04,057 INFO L231 Difference]: Finished difference. Result has 149 places, 255 transitions, 3073 flow [2024-06-20 16:03:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3073, PETRI_PLACES=149, PETRI_TRANSITIONS=255} [2024-06-20 16:03:04,058 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-20 16:03:04,058 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 255 transitions, 3073 flow [2024-06-20 16:03:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:04,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:04,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:03:04,059 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:04,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash 244520209, now seen corresponding path program 2 times [2024-06-20 16:03:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234037947] [2024-06-20 16:03:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:05,138 INFO 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 16:03:05,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:05,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234037947] [2024-06-20 16:03:05,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234037947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:05,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:05,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:03:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793923269] [2024-06-20 16:03:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:05,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:03:05,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:03:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:03:05,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:03:05,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 255 transitions, 3073 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:05,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:05,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:03:05,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:07,929 INFO L124 PetriNetUnfolderBase]: 11295/16335 cut-off events. [2024-06-20 16:03:07,929 INFO L125 PetriNetUnfolderBase]: For 483290/483296 co-relation queries the response was YES. [2024-06-20 16:03:08,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102699 conditions, 16335 events. 11295/16335 cut-off events. For 483290/483296 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 97052 event pairs, 3806 based on Foata normal form. 5/16271 useless extension candidates. Maximal degree in co-relation 102634. Up to 15299 conditions per place.