./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.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/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.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-cde23df-m [2024-06-14 12:39:17,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:39:17,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:39:17,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:39:17,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:39:17,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:39:17,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:39:17,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:39:17,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:39:17,866 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:39:17,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:39:17,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:39:17,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:39:17,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:39:17,869 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:39:17,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:39:17,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:39:17,870 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:39:17,870 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:39:17,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:39:17,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:39:17,871 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:39:17,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:39:17,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:39:17,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:39:17,872 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:39:17,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:39:17,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:39:17,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:39:17,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:39:17,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:39:17,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:39:17,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:39:17,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:39:17,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:39:17,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:39:17,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:39:17,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:39:17,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:39:17,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:39:17,877 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:39:17,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:39:17,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:39:17,880 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:39:18,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:39:18,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:39:18,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:39:18,186 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:39:18,186 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:39:18,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:39:19,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:39:19,684 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:39:19,685 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:39:19,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaf02481/db1854188aa349ca8cd67a5ad0cabb5b/FLAG13aca94dc [2024-06-14 12:39:19,713 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaf02481/db1854188aa349ca8cd67a5ad0cabb5b [2024-06-14 12:39:19,715 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:39:19,715 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:39:19,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:39:19,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:39:19,938 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:39:19,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:39:19,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:39:19,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:39:19,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:39:19" (1/2) ... [2024-06-14 12:39:19,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753aa21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:39:19, skipping insertion in model container [2024-06-14 12:39:19,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:39:19" (1/2) ... [2024-06-14 12:39:19,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7eb299a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:39:19, skipping insertion in model container [2024-06-14 12:39:19,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:39:19" (2/2) ... [2024-06-14 12:39:19,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753aa21c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:19, skipping insertion in model container [2024-06-14 12:39:19,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:39:19" (2/2) ... [2024-06-14 12:39:19,949 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:39:20,075 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:39:20,077 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-14 12:39:20,077 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! 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_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-14 12:39:20,077 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-14 12:39:20,077 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! 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_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-14 12:39:20,078 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:39:20,078 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-14 12:39:20,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:39:20,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:39:20,541 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:39:20,687 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:39:20,730 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:39:20,732 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20 WrapperNode [2024-06-14 12:39:20,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:39:20,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:39:20,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:39:20,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:39:20,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,813 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 155 [2024-06-14 12:39:20,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:39:20,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:39:20,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:39:20,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:39:20,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,831 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,853 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]. [2024-06-14 12:39:20,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,880 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:39:20,889 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:39:20,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:39:20,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:39:20,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (1/1) ... [2024-06-14 12:39:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:39:20,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:39:20,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:39:20,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:39:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:39:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:39:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:39:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:39:21,005 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:39:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:39:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:39:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:39:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:39:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:39:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:39:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:39:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:39:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:39:21,009 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:39:21,177 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:39:21,179 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:39:21,572 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:39:21,574 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:39:21,801 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:39:21,801 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:39:21,802 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:39:21 BoogieIcfgContainer [2024-06-14 12:39:21,802 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:39:21,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:39:21,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:39:21,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:39:21,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:39:19" (1/4) ... [2024-06-14 12:39:21,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31133b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:39:21, skipping insertion in model container [2024-06-14 12:39:21,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:39:19" (2/4) ... [2024-06-14 12:39:21,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31133b19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:39:21, skipping insertion in model container [2024-06-14 12:39:21,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:39:20" (3/4) ... [2024-06-14 12:39:21,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31133b19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:39:21, skipping insertion in model container [2024-06-14 12:39:21,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:39:21" (4/4) ... [2024-06-14 12:39:21,813 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:39:21,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:39:21,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:39:21,832 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:39:21,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:39:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:39:21,976 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 12:39:21,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:39:21,979 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 83 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. [2024-06-14 12:39:21,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:39:21,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 12:39:22,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:39:22,010 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;@4643779b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:39:22,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:39:22,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:39:22,017 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:39:22,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:39:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:22,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:39:22,018 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)] === [2024-06-14 12:39:22,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1243262608, now seen corresponding path program 1 times [2024-06-14 12:39:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87031003] [2024-06-14 12:39:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:23,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87031003] [2024-06-14 12:39:23,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87031003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:23,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:23,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:39:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376565852] [2024-06-14 12:39:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:39:23,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:39:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:39:23,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:39:23,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:23,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:39:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:25,183 INFO L124 PetriNetUnfolderBase]: 8152/11426 cut-off events. [2024-06-14 12:39:25,183 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-14 12:39:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22915 conditions, 11426 events. 8152/11426 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 62178 event pairs, 6174 based on Foata normal form. 1/11242 useless extension candidates. Maximal degree in co-relation 22899. Up to 11108 conditions per place. [2024-06-14 12:39:25,262 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 12:39:25,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 231 flow [2024-06-14 12:39:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:39:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:39:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-14 12:39:25,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-14 12:39:25,276 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 92 transitions. [2024-06-14 12:39:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 231 flow [2024-06-14 12:39:25,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:25,282 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 12:39:25,284 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} [2024-06-14 12:39:25,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 12:39:25,288 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 12:39:25,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:25,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:25,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:25,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:39:25,289 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)] === [2024-06-14 12:39:25,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash -774425265, now seen corresponding path program 1 times [2024-06-14 12:39:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:25,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576238624] [2024-06-14 12:39:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:25,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:26,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576238624] [2024-06-14 12:39:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576238624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:26,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:39:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350796964] [2024-06-14 12:39:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:26,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:39:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:39:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:39:26,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:26,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:26,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:26,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:26,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:27,901 INFO L124 PetriNetUnfolderBase]: 9537/13007 cut-off events. [2024-06-14 12:39:27,901 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-06-14 12:39:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29772 conditions, 13007 events. 9537/13007 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67969 event pairs, 6489 based on Foata normal form. 4/13004 useless extension candidates. Maximal degree in co-relation 29757. Up to 12918 conditions per place. [2024-06-14 12:39:28,005 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 55 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 12:39:28,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 325 flow [2024-06-14 12:39:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:39:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:39:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-14 12:39:28,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-14 12:39:28,010 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 116 transitions. [2024-06-14 12:39:28,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 325 flow [2024-06-14 12:39:28,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:39:28,014 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-14 12:39:28,014 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} [2024-06-14 12:39:28,015 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-14 12:39:28,016 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-14 12:39:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:28,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:28,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:28,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:39:28,020 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)] === [2024-06-14 12:39:28,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1762621645, now seen corresponding path program 1 times [2024-06-14 12:39:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:28,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311659178] [2024-06-14 12:39:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:28,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:28,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311659178] [2024-06-14 12:39:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311659178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:28,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:39:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353026474] [2024-06-14 12:39:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:28,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:39:28,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:39:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:39:29,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:29,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:29,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:29,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:29,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:30,636 INFO L124 PetriNetUnfolderBase]: 9555/13088 cut-off events. [2024-06-14 12:39:30,637 INFO L125 PetriNetUnfolderBase]: For 7252/7252 co-relation queries the response was YES. [2024-06-14 12:39:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33315 conditions, 13088 events. 9555/13088 cut-off events. For 7252/7252 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69241 event pairs, 5076 based on Foata normal form. 7/13091 useless extension candidates. Maximal degree in co-relation 33298. Up to 12839 conditions per place. [2024-06-14 12:39:30,732 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 73 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-14 12:39:30,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 541 flow [2024-06-14 12:39:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:39:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:39:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 12:39:30,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-14 12:39:30,738 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 152 transitions. [2024-06-14 12:39:30,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 541 flow [2024-06-14 12:39:30,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:30,746 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-14 12:39:30,746 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} [2024-06-14 12:39:30,747 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 12:39:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-14 12:39:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:39:30,749 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)] === [2024-06-14 12:39:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1662321932, now seen corresponding path program 1 times [2024-06-14 12:39:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014271121] [2024-06-14 12:39:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:31,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:31,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014271121] [2024-06-14 12:39:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014271121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:31,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:31,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:39:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255745563] [2024-06-14 12:39:31,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:31,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:39:31,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:39:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:39:31,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:31,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:31,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:31,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:31,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:33,143 INFO L124 PetriNetUnfolderBase]: 9584/13131 cut-off events. [2024-06-14 12:39:33,143 INFO L125 PetriNetUnfolderBase]: For 17391/17397 co-relation queries the response was YES. [2024-06-14 12:39:33,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39034 conditions, 13131 events. 9584/13131 cut-off events. For 17391/17397 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69603 event pairs, 4111 based on Foata normal form. 18/13145 useless extension candidates. Maximal degree in co-relation 39014. Up to 12804 conditions per place. [2024-06-14 12:39:33,252 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 80 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-14 12:39:33,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 686 flow [2024-06-14 12:39:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 12:39:33,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-14 12:39:33,255 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 175 transitions. [2024-06-14 12:39:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 686 flow [2024-06-14 12:39:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 674 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:39:33,264 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-14 12:39:33,265 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} [2024-06-14 12:39:33,266 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-14 12:39:33,266 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-14 12:39:33,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:33,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:33,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:39:33,267 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)] === [2024-06-14 12:39:33,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1113872748, now seen corresponding path program 1 times [2024-06-14 12:39:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:33,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959771062] [2024-06-14 12:39:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959771062] [2024-06-14 12:39:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959771062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:34,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:34,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:39:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768187704] [2024-06-14 12:39:34,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:34,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:39:34,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:39:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:39:34,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:34,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:34,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:34,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:34,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:35,440 INFO L124 PetriNetUnfolderBase]: 8180/11489 cut-off events. [2024-06-14 12:39:35,440 INFO L125 PetriNetUnfolderBase]: For 22164/22164 co-relation queries the response was YES. [2024-06-14 12:39:35,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37136 conditions, 11489 events. 8180/11489 cut-off events. For 22164/22164 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 62960 event pairs, 4129 based on Foata normal form. 3/11490 useless extension candidates. Maximal degree in co-relation 37113. Up to 11135 conditions per place. [2024-06-14 12:39:35,522 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 67 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-14 12:39:35,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 585 flow [2024-06-14 12:39:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:39:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:39:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 12:39:35,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-14 12:39:35,524 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 122 transitions. [2024-06-14 12:39:35,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 585 flow [2024-06-14 12:39:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 516 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:35,535 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 349 flow [2024-06-14 12:39:35,535 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} [2024-06-14 12:39:35,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-14 12:39:35,536 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 349 flow [2024-06-14 12:39:35,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:35,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:35,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:39:35,537 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)] === [2024-06-14 12:39:35,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 169568660, now seen corresponding path program 1 times [2024-06-14 12:39:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910171708] [2024-06-14 12:39:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910171708] [2024-06-14 12:39:36,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910171708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:36,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:36,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491743402] [2024-06-14 12:39:36,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:36,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:36,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:36,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:36,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:36,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:37,924 INFO L124 PetriNetUnfolderBase]: 8192/11546 cut-off events. [2024-06-14 12:39:37,924 INFO L125 PetriNetUnfolderBase]: For 25442/25442 co-relation queries the response was YES. [2024-06-14 12:39:37,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37775 conditions, 11546 events. 8192/11546 cut-off events. For 25442/25442 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63159 event pairs, 3950 based on Foata normal form. 5/11544 useless extension candidates. Maximal degree in co-relation 37750. Up to 11085 conditions per place. [2024-06-14 12:39:37,982 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 80 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-14 12:39:37,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 747 flow [2024-06-14 12:39:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:39:37,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-14 12:39:37,985 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 349 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:39:37,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 747 flow [2024-06-14 12:39:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 718 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:37,998 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 494 flow [2024-06-14 12:39:37,998 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} [2024-06-14 12:39:38,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-14 12:39:38,001 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 494 flow [2024-06-14 12:39:38,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:38,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:38,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:38,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:39:38,002 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)] === [2024-06-14 12:39:38,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 263300009, now seen corresponding path program 1 times [2024-06-14 12:39:38,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149441719] [2024-06-14 12:39:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:38,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:38,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149441719] [2024-06-14 12:39:38,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149441719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:38,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855031376] [2024-06-14 12:39:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:38,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:38,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:39,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:39,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:39,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:39,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:39,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:40,529 INFO L124 PetriNetUnfolderBase]: 9600/13121 cut-off events. [2024-06-14 12:39:40,530 INFO L125 PetriNetUnfolderBase]: For 45793/45805 co-relation queries the response was YES. [2024-06-14 12:39:40,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48575 conditions, 13121 events. 9600/13121 cut-off events. For 45793/45805 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68598 event pairs, 4758 based on Foata normal form. 14/13131 useless extension candidates. Maximal degree in co-relation 48548. Up to 12898 conditions per place. [2024-06-14 12:39:40,617 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 84 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-14 12:39:40,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 855 flow [2024-06-14 12:39:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 12:39:40,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-14 12:39:40,620 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 494 flow. Second operand 6 states and 150 transitions. [2024-06-14 12:39:40,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 855 flow [2024-06-14 12:39:40,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 831 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 12:39:40,651 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 566 flow [2024-06-14 12:39:40,651 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} [2024-06-14 12:39:40,654 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-14 12:39:40,654 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 566 flow [2024-06-14 12:39:40,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:40,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:40,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:39:40,655 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)] === [2024-06-14 12:39:40,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 984891659, now seen corresponding path program 2 times [2024-06-14 12:39:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117655825] [2024-06-14 12:39:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117655825] [2024-06-14 12:39:41,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117655825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:41,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:41,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429106152] [2024-06-14 12:39:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:41,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:41,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:41,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 566 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:41,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:41,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:41,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:43,054 INFO L124 PetriNetUnfolderBase]: 9576/13073 cut-off events. [2024-06-14 12:39:43,055 INFO L125 PetriNetUnfolderBase]: For 51024/51024 co-relation queries the response was YES. [2024-06-14 12:39:43,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48988 conditions, 13073 events. 9576/13073 cut-off events. For 51024/51024 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68202 event pairs, 4778 based on Foata normal form. 3/13067 useless extension candidates. Maximal degree in co-relation 48958. Up to 12868 conditions per place. [2024-06-14 12:39:43,148 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-14 12:39:43,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 834 flow [2024-06-14 12:39:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 12:39:43,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-14 12:39:43,150 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 566 flow. Second operand 6 states and 145 transitions. [2024-06-14 12:39:43,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 834 flow [2024-06-14 12:39:43,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 791 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:43,175 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 586 flow [2024-06-14 12:39:43,175 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} [2024-06-14 12:39:43,176 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-14 12:39:43,176 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 586 flow [2024-06-14 12:39:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:43,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:43,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:43,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:39:43,178 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)] === [2024-06-14 12:39:43,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 52257859, now seen corresponding path program 1 times [2024-06-14 12:39:43,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:43,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397747979] [2024-06-14 12:39:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:43,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397747979] [2024-06-14 12:39:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397747979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:44,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:44,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042997550] [2024-06-14 12:39:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:44,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:44,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:44,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:44,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:46,067 INFO L124 PetriNetUnfolderBase]: 10114/13853 cut-off events. [2024-06-14 12:39:46,068 INFO L125 PetriNetUnfolderBase]: For 65318/65321 co-relation queries the response was YES. [2024-06-14 12:39:46,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53370 conditions, 13853 events. 10114/13853 cut-off events. For 65318/65321 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 73895 event pairs, 4210 based on Foata normal form. 12/13855 useless extension candidates. Maximal degree in co-relation 53339. Up to 12889 conditions per place. [2024-06-14 12:39:46,174 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 123 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-14 12:39:46,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1664 flow [2024-06-14 12:39:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:39:46,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-14 12:39:46,176 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 586 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:39:46,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1664 flow [2024-06-14 12:39:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 188 transitions, 1501 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:46,217 INFO L231 Difference]: Finished difference. Result has 85 places, 121 transitions, 937 flow [2024-06-14 12:39:46,218 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} [2024-06-14 12:39:46,218 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-14 12:39:46,219 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 121 transitions, 937 flow [2024-06-14 12:39:46,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:46,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:46,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:46,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:39:46,220 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)] === [2024-06-14 12:39:46,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash -427632893, now seen corresponding path program 2 times [2024-06-14 12:39:46,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685716408] [2024-06-14 12:39:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:47,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:47,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685716408] [2024-06-14 12:39:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685716408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:47,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978748604] [2024-06-14 12:39:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:47,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:47,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 121 transitions, 937 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:47,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:47,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:47,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:49,323 INFO L124 PetriNetUnfolderBase]: 10462/14371 cut-off events. [2024-06-14 12:39:49,323 INFO L125 PetriNetUnfolderBase]: For 93922/93931 co-relation queries the response was YES. [2024-06-14 12:39:49,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63519 conditions, 14371 events. 10462/14371 cut-off events. For 93922/93931 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77290 event pairs, 4341 based on Foata normal form. 24/14385 useless extension candidates. Maximal degree in co-relation 63484. Up to 13157 conditions per place. [2024-06-14 12:39:49,460 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 102 selfloop transitions, 81 changer transitions 0/189 dead transitions. [2024-06-14 12:39:49,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 189 transitions, 1807 flow [2024-06-14 12:39:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:39:49,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-06-14 12:39:49,462 INFO L175 Difference]: Start difference. First operand has 85 places, 121 transitions, 937 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:39:49,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 189 transitions, 1807 flow [2024-06-14 12:39:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 189 transitions, 1713 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:49,546 INFO L231 Difference]: Finished difference. Result has 92 places, 142 transitions, 1310 flow [2024-06-14 12:39:49,546 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} [2024-06-14 12:39:49,546 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-14 12:39:49,547 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 142 transitions, 1310 flow [2024-06-14 12:39:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:49,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:49,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:39:49,548 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)] === [2024-06-14 12:39:49,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 483852647, now seen corresponding path program 3 times [2024-06-14 12:39:49,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:49,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819015854] [2024-06-14 12:39:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:49,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:50,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819015854] [2024-06-14 12:39:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819015854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:50,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270399601] [2024-06-14 12:39:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:50,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:50,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 142 transitions, 1310 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:50,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:50,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:50,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:52,448 INFO L124 PetriNetUnfolderBase]: 10544/14484 cut-off events. [2024-06-14 12:39:52,448 INFO L125 PetriNetUnfolderBase]: For 123364/123371 co-relation queries the response was YES. [2024-06-14 12:39:52,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69991 conditions, 14484 events. 10544/14484 cut-off events. For 123364/123371 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77606 event pairs, 4361 based on Foata normal form. 13/14477 useless extension candidates. Maximal degree in co-relation 69952. Up to 13209 conditions per place. [2024-06-14 12:39:52,539 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 106 selfloop transitions, 93 changer transitions 0/205 dead transitions. [2024-06-14 12:39:52,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 205 transitions, 2252 flow [2024-06-14 12:39:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:39:52,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:39:52,542 INFO L175 Difference]: Start difference. First operand has 92 places, 142 transitions, 1310 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:39:52,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 205 transitions, 2252 flow [2024-06-14 12:39:52,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 205 transitions, 2125 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:52,624 INFO L231 Difference]: Finished difference. Result has 97 places, 158 transitions, 1593 flow [2024-06-14 12:39:52,624 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} [2024-06-14 12:39:52,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-14 12:39:52,625 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 158 transitions, 1593 flow [2024-06-14 12:39:52,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:52,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:39:52,626 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)] === [2024-06-14 12:39:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -253237453, now seen corresponding path program 4 times [2024-06-14 12:39:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889041500] [2024-06-14 12:39:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:53,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889041500] [2024-06-14 12:39:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889041500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:53,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:53,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:53,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347805196] [2024-06-14 12:39:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:53,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:53,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:39:53,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 158 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:53,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:53,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:39:53,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:55,392 INFO L124 PetriNetUnfolderBase]: 10559/14516 cut-off events. [2024-06-14 12:39:55,393 INFO L125 PetriNetUnfolderBase]: For 152855/152872 co-relation queries the response was YES. [2024-06-14 12:39:55,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73890 conditions, 14516 events. 10559/14516 cut-off events. For 152855/152872 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77990 event pairs, 4341 based on Foata normal form. 22/14518 useless extension candidates. Maximal degree in co-relation 73849. Up to 13227 conditions per place. [2024-06-14 12:39:55,524 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 96 selfloop transitions, 108 changer transitions 0/210 dead transitions. [2024-06-14 12:39:55,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2412 flow [2024-06-14 12:39:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:39:55,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-14 12:39:55,526 INFO L175 Difference]: Start difference. First operand has 97 places, 158 transitions, 1593 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:39:55,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2412 flow [2024-06-14 12:39:55,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 210 transitions, 2217 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:55,812 INFO L231 Difference]: Finished difference. Result has 101 places, 166 transitions, 1746 flow [2024-06-14 12:39:55,812 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} [2024-06-14 12:39:55,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-14 12:39:55,813 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 166 transitions, 1746 flow [2024-06-14 12:39:55,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:55,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:55,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:55,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:39:55,814 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)] === [2024-06-14 12:39:55,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -253228525, now seen corresponding path program 1 times [2024-06-14 12:39:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377999294] [2024-06-14 12:39:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377999294] [2024-06-14 12:39:56,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377999294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:56,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:56,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839521119] [2024-06-14 12:39:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:56,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:56,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:56,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 166 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:56,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:56,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:56,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:58,624 INFO L124 PetriNetUnfolderBase]: 9184/12878 cut-off events. [2024-06-14 12:39:58,624 INFO L125 PetriNetUnfolderBase]: For 138243/138248 co-relation queries the response was YES. [2024-06-14 12:39:58,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65872 conditions, 12878 events. 9184/12878 cut-off events. For 138243/138248 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70430 event pairs, 3611 based on Foata normal form. 12/12887 useless extension candidates. Maximal degree in co-relation 65829. Up to 12350 conditions per place. [2024-06-14 12:39:58,726 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 173 selfloop transitions, 26 changer transitions 0/206 dead transitions. [2024-06-14 12:39:58,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 206 transitions, 2394 flow [2024-06-14 12:39:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:39:58,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-14 12:39:58,728 INFO L175 Difference]: Start difference. First operand has 101 places, 166 transitions, 1746 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:39:58,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 206 transitions, 2394 flow [2024-06-14 12:39:58,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 206 transitions, 2204 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:58,862 INFO L231 Difference]: Finished difference. Result has 104 places, 170 transitions, 1673 flow [2024-06-14 12:39:58,863 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=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=104, PETRI_TRANSITIONS=170} [2024-06-14 12:39:58,863 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:39:58,863 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 170 transitions, 1673 flow [2024-06-14 12:39:58,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:58,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:58,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:39:58,864 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)] === [2024-06-14 12:39:58,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1121013752, now seen corresponding path program 1 times [2024-06-14 12:39:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172999658] [2024-06-14 12:39:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:59,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172999658] [2024-06-14 12:39:59,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172999658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:59,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:59,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:39:59,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355139764] [2024-06-14 12:39:59,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:59,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:39:59,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:59,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:39:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:39:59,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:39:59,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 170 transitions, 1673 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:59,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:59,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:39:59,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:01,116 INFO L124 PetriNetUnfolderBase]: 9177/12865 cut-off events. [2024-06-14 12:40:01,116 INFO L125 PetriNetUnfolderBase]: For 150903/150905 co-relation queries the response was YES. [2024-06-14 12:40:01,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67265 conditions, 12865 events. 9177/12865 cut-off events. For 150903/150905 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70431 event pairs, 3745 based on Foata normal form. 2/12865 useless extension candidates. Maximal degree in co-relation 67221. Up to 12465 conditions per place. [2024-06-14 12:40:01,220 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 167 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-06-14 12:40:01,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 2071 flow [2024-06-14 12:40:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:40:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:40:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 12:40:01,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-14 12:40:01,223 INFO L175 Difference]: Start difference. First operand has 104 places, 170 transitions, 1673 flow. Second operand 5 states and 118 transitions. [2024-06-14 12:40:01,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 2071 flow [2024-06-14 12:40:01,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 1976 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:01,353 INFO L231 Difference]: Finished difference. Result has 104 places, 170 transitions, 1607 flow [2024-06-14 12:40:01,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1607, PETRI_PLACES=104, PETRI_TRANSITIONS=170} [2024-06-14 12:40:01,353 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:40:01,354 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 170 transitions, 1607 flow [2024-06-14 12:40:01,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:01,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:01,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:01,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:40:01,354 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)] === [2024-06-14 12:40:01,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 532915763, now seen corresponding path program 1 times [2024-06-14 12:40:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:01,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040006725] [2024-06-14 12:40:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040006725] [2024-06-14 12:40:02,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040006725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:02,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:02,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:02,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337343910] [2024-06-14 12:40:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:02,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:02,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:02,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 170 transitions, 1607 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:02,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:02,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:02,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:04,166 INFO L124 PetriNetUnfolderBase]: 10658/14689 cut-off events. [2024-06-14 12:40:04,166 INFO L125 PetriNetUnfolderBase]: For 191650/191665 co-relation queries the response was YES. [2024-06-14 12:40:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77424 conditions, 14689 events. 10658/14689 cut-off events. For 191650/191665 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79392 event pairs, 4423 based on Foata normal form. 24/14703 useless extension candidates. Maximal degree in co-relation 77379. Up to 13336 conditions per place. [2024-06-14 12:40:04,275 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 117 selfloop transitions, 112 changer transitions 0/235 dead transitions. [2024-06-14 12:40:04,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 235 transitions, 2655 flow [2024-06-14 12:40:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:40:04,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-14 12:40:04,277 INFO L175 Difference]: Start difference. First operand has 104 places, 170 transitions, 1607 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:40:04,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 235 transitions, 2655 flow [2024-06-14 12:40:04,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 235 transitions, 2622 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:04,393 INFO L231 Difference]: Finished difference. Result has 109 places, 187 transitions, 2153 flow [2024-06-14 12:40:04,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2153, PETRI_PLACES=109, PETRI_TRANSITIONS=187} [2024-06-14 12:40:04,394 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-14 12:40:04,394 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 187 transitions, 2153 flow [2024-06-14 12:40:04,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:04,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:04,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:40:04,395 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)] === [2024-06-14 12:40:04,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 532921343, now seen corresponding path program 2 times [2024-06-14 12:40:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:04,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656007773] [2024-06-14 12:40:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:05,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:05,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656007773] [2024-06-14 12:40:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656007773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:05,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460114408] [2024-06-14 12:40:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:05,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:05,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 187 transitions, 2153 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:05,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:05,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:07,240 INFO L124 PetriNetUnfolderBase]: 10738/14832 cut-off events. [2024-06-14 12:40:07,240 INFO L125 PetriNetUnfolderBase]: For 226877/226906 co-relation queries the response was YES. [2024-06-14 12:40:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83555 conditions, 14832 events. 10738/14832 cut-off events. For 226877/226906 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80463 event pairs, 4411 based on Foata normal form. 36/14858 useless extension candidates. Maximal degree in co-relation 83508. Up to 13414 conditions per place. [2024-06-14 12:40:07,366 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 116 selfloop transitions, 117 changer transitions 0/239 dead transitions. [2024-06-14 12:40:07,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 239 transitions, 3061 flow [2024-06-14 12:40:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:40:07,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-14 12:40:07,368 INFO L175 Difference]: Start difference. First operand has 109 places, 187 transitions, 2153 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:40:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 239 transitions, 3061 flow [2024-06-14 12:40:07,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 239 transitions, 2900 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:07,549 INFO L231 Difference]: Finished difference. Result has 113 places, 196 transitions, 2378 flow [2024-06-14 12:40:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2378, PETRI_PLACES=113, PETRI_TRANSITIONS=196} [2024-06-14 12:40:07,550 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-14 12:40:07,550 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 196 transitions, 2378 flow [2024-06-14 12:40:07,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:07,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:07,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:40:07,551 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)] === [2024-06-14 12:40:07,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1595476083, now seen corresponding path program 3 times [2024-06-14 12:40:07,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:07,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569239253] [2024-06-14 12:40:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:07,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:08,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:08,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569239253] [2024-06-14 12:40:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569239253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:08,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:08,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255903756] [2024-06-14 12:40:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:08,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:08,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 196 transitions, 2378 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:08,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:08,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:10,526 INFO L124 PetriNetUnfolderBase]: 10753/14871 cut-off events. [2024-06-14 12:40:10,526 INFO L125 PetriNetUnfolderBase]: For 248468/248553 co-relation queries the response was YES. [2024-06-14 12:40:10,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84758 conditions, 14871 events. 10753/14871 cut-off events. For 248468/248553 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81054 event pairs, 4454 based on Foata normal form. 66/14894 useless extension candidates. Maximal degree in co-relation 84710. Up to 13437 conditions per place. [2024-06-14 12:40:10,654 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 124 changer transitions 0/242 dead transitions. [2024-06-14 12:40:10,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 242 transitions, 3186 flow [2024-06-14 12:40:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 12:40:10,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-14 12:40:10,657 INFO L175 Difference]: Start difference. First operand has 113 places, 196 transitions, 2378 flow. Second operand 7 states and 174 transitions. [2024-06-14 12:40:10,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 242 transitions, 3186 flow [2024-06-14 12:40:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 242 transitions, 2982 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:10,822 INFO L231 Difference]: Finished difference. Result has 116 places, 205 transitions, 2582 flow [2024-06-14 12:40:10,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2582, PETRI_PLACES=116, PETRI_TRANSITIONS=205} [2024-06-14 12:40:10,823 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-14 12:40:10,823 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 205 transitions, 2582 flow [2024-06-14 12:40:10,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:10,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:10,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:40:10,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:10,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash -391685888, now seen corresponding path program 1 times [2024-06-14 12:40:10,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:10,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462054783] [2024-06-14 12:40:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:10,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:11,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462054783] [2024-06-14 12:40:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462054783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:11,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:11,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:40:11,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782838534] [2024-06-14 12:40:11,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:11,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:40:11,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:40:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:40:11,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:40:11,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 205 transitions, 2582 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:40:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:13,367 INFO L124 PetriNetUnfolderBase]: 9344/13405 cut-off events. [2024-06-14 12:40:13,367 INFO L125 PetriNetUnfolderBase]: For 230043/230045 co-relation queries the response was YES. [2024-06-14 12:40:13,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76693 conditions, 13405 events. 9344/13405 cut-off events. For 230043/230045 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 75588 event pairs, 3735 based on Foata normal form. 4/13407 useless extension candidates. Maximal degree in co-relation 76644. Up to 12672 conditions per place. [2024-06-14 12:40:13,494 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 207 selfloop transitions, 14 changer transitions 0/228 dead transitions. [2024-06-14 12:40:13,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 228 transitions, 3124 flow [2024-06-14 12:40:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:40:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:40:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 12:40:13,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-14 12:40:13,496 INFO L175 Difference]: Start difference. First operand has 116 places, 205 transitions, 2582 flow. Second operand 6 states and 139 transitions. [2024-06-14 12:40:13,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 228 transitions, 3124 flow [2024-06-14 12:40:13,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 228 transitions, 2912 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:13,767 INFO L231 Difference]: Finished difference. Result has 118 places, 209 transitions, 2457 flow [2024-06-14 12:40:13,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2457, PETRI_PLACES=118, PETRI_TRANSITIONS=209} [2024-06-14 12:40:13,767 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-14 12:40:13,768 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 209 transitions, 2457 flow [2024-06-14 12:40:13,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:13,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:13,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:40:13,768 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)] === [2024-06-14 12:40:13,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1243363878, now seen corresponding path program 1 times [2024-06-14 12:40:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:13,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077491327] [2024-06-14 12:40:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077491327] [2024-06-14 12:40:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077491327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:14,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:14,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696789774] [2024-06-14 12:40:14,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:14,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:14,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:14,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:14,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 209 transitions, 2457 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:14,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:14,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:16,458 INFO L124 PetriNetUnfolderBase]: 10775/14880 cut-off events. [2024-06-14 12:40:16,458 INFO L125 PetriNetUnfolderBase]: For 289455/289493 co-relation queries the response was YES. [2024-06-14 12:40:16,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88343 conditions, 14880 events. 10775/14880 cut-off events. For 289455/289493 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80061 event pairs, 3384 based on Foata normal form. 38/14914 useless extension candidates. Maximal degree in co-relation 88292. Up to 14194 conditions per place. [2024-06-14 12:40:16,625 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 208 selfloop transitions, 41 changer transitions 0/255 dead transitions. [2024-06-14 12:40:16,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 255 transitions, 3305 flow [2024-06-14 12:40:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 12:40:16,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-14 12:40:16,627 INFO L175 Difference]: Start difference. First operand has 118 places, 209 transitions, 2457 flow. Second operand 7 states and 172 transitions. [2024-06-14 12:40:16,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 255 transitions, 3305 flow [2024-06-14 12:40:16,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 255 transitions, 3248 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:16,871 INFO L231 Difference]: Finished difference. Result has 121 places, 215 transitions, 2618 flow [2024-06-14 12:40:16,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2618, PETRI_PLACES=121, PETRI_TRANSITIONS=215} [2024-06-14 12:40:16,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-14 12:40:16,872 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 215 transitions, 2618 flow [2024-06-14 12:40:16,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:16,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:16,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:16,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:40:16,873 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)] === [2024-06-14 12:40:16,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 175385016, now seen corresponding path program 2 times [2024-06-14 12:40:16,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116323691] [2024-06-14 12:40:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:16,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:17,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:17,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116323691] [2024-06-14 12:40:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116323691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:17,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:17,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058155469] [2024-06-14 12:40:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:17,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:17,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:17,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 215 transitions, 2618 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:17,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:17,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:19,683 INFO L124 PetriNetUnfolderBase]: 10760/14850 cut-off events. [2024-06-14 12:40:19,683 INFO L125 PetriNetUnfolderBase]: For 319020/319042 co-relation queries the response was YES. [2024-06-14 12:40:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90792 conditions, 14850 events. 10760/14850 cut-off events. For 319020/319042 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79767 event pairs, 4050 based on Foata normal form. 22/14868 useless extension candidates. Maximal degree in co-relation 90740. Up to 14309 conditions per place. [2024-06-14 12:40:19,804 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 207 selfloop transitions, 40 changer transitions 0/253 dead transitions. [2024-06-14 12:40:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 253 transitions, 3242 flow [2024-06-14 12:40:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 12:40:19,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:40:19,806 INFO L175 Difference]: Start difference. First operand has 121 places, 215 transitions, 2618 flow. Second operand 7 states and 169 transitions. [2024-06-14 12:40:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 253 transitions, 3242 flow [2024-06-14 12:40:20,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 253 transitions, 3106 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:20,139 INFO L231 Difference]: Finished difference. Result has 125 places, 215 transitions, 2574 flow [2024-06-14 12:40:20,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2574, PETRI_PLACES=125, PETRI_TRANSITIONS=215} [2024-06-14 12:40:20,139 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-14 12:40:20,139 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 215 transitions, 2574 flow [2024-06-14 12:40:20,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:20,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:20,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:20,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:40:20,140 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:20,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1361696706, now seen corresponding path program 1 times [2024-06-14 12:40:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:20,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842344399] [2024-06-14 12:40:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:21,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842344399] [2024-06-14 12:40:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842344399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:21,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600246166] [2024-06-14 12:40:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:21,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:21,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:21,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 215 transitions, 2574 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:21,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:21,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:21,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:23,463 INFO L124 PetriNetUnfolderBase]: 11085/15324 cut-off events. [2024-06-14 12:40:23,463 INFO L125 PetriNetUnfolderBase]: For 357021/357037 co-relation queries the response was YES. [2024-06-14 12:40:23,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94463 conditions, 15324 events. 11085/15324 cut-off events. For 357021/357037 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83282 event pairs, 4024 based on Foata normal form. 62/15376 useless extension candidates. Maximal degree in co-relation 94409. Up to 13521 conditions per place. [2024-06-14 12:40:23,572 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 133 changer transitions 0/273 dead transitions. [2024-06-14 12:40:23,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 273 transitions, 3600 flow [2024-06-14 12:40:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 12:40:23,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-14 12:40:23,574 INFO L175 Difference]: Start difference. First operand has 125 places, 215 transitions, 2574 flow. Second operand 8 states and 209 transitions. [2024-06-14 12:40:23,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 273 transitions, 3600 flow [2024-06-14 12:40:23,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 273 transitions, 3508 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:23,801 INFO L231 Difference]: Finished difference. Result has 127 places, 219 transitions, 2846 flow [2024-06-14 12:40:23,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=127, PETRI_TRANSITIONS=219} [2024-06-14 12:40:23,801 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-14 12:40:23,801 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 219 transitions, 2846 flow [2024-06-14 12:40:23,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:23,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:23,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:40:23,802 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:23,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -385069051, now seen corresponding path program 1 times [2024-06-14 12:40:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:23,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218090033] [2024-06-14 12:40:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:23,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:24,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218090033] [2024-06-14 12:40:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218090033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:24,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:40:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417672920] [2024-06-14 12:40:24,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:40:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:40:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:40:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:24,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 219 transitions, 2846 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:24,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:24,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:26,675 INFO L124 PetriNetUnfolderBase]: 11108/15357 cut-off events. [2024-06-14 12:40:26,675 INFO L125 PetriNetUnfolderBase]: For 383940/383956 co-relation queries the response was YES. [2024-06-14 12:40:26,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99099 conditions, 15357 events. 11108/15357 cut-off events. For 383940/383956 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83214 event pairs, 4061 based on Foata normal form. 18/15372 useless extension candidates. Maximal degree in co-relation 99044. Up to 15010 conditions per place. [2024-06-14 12:40:26,812 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 220 selfloop transitions, 29 changer transitions 0/255 dead transitions. [2024-06-14 12:40:26,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 255 transitions, 3666 flow [2024-06-14 12:40:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:40:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:40:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:40:26,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:40:26,813 INFO L175 Difference]: Start difference. First operand has 127 places, 219 transitions, 2846 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:40:26,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 255 transitions, 3666 flow [2024-06-14 12:40:27,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 3344 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:27,250 INFO L231 Difference]: Finished difference. Result has 127 places, 226 transitions, 2732 flow [2024-06-14 12:40:27,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2732, PETRI_PLACES=127, PETRI_TRANSITIONS=226} [2024-06-14 12:40:27,250 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-14 12:40:27,251 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 226 transitions, 2732 flow [2024-06-14 12:40:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:27,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:27,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:27,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:40:27,251 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)] === [2024-06-14 12:40:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1224088852, now seen corresponding path program 2 times [2024-06-14 12:40:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099421169] [2024-06-14 12:40:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099421169] [2024-06-14 12:40:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099421169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:28,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:28,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141352097] [2024-06-14 12:40:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:28,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:28,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 226 transitions, 2732 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:28,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:28,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:28,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:30,537 INFO L124 PetriNetUnfolderBase]: 11179/15434 cut-off events. [2024-06-14 12:40:30,537 INFO L125 PetriNetUnfolderBase]: For 400338/400350 co-relation queries the response was YES. [2024-06-14 12:40:30,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98355 conditions, 15434 events. 11179/15434 cut-off events. For 400338/400350 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 83509 event pairs, 4063 based on Foata normal form. 18/15421 useless extension candidates. Maximal degree in co-relation 98299. Up to 13972 conditions per place. [2024-06-14 12:40:30,676 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 133 selfloop transitions, 140 changer transitions 0/279 dead transitions. [2024-06-14 12:40:30,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 279 transitions, 3786 flow [2024-06-14 12:40:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:40:30,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-14 12:40:30,678 INFO L175 Difference]: Start difference. First operand has 127 places, 226 transitions, 2732 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:40:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 279 transitions, 3786 flow [2024-06-14 12:40:31,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 279 transitions, 3452 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:31,036 INFO L231 Difference]: Finished difference. Result has 129 places, 230 transitions, 2780 flow [2024-06-14 12:40:31,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=129, PETRI_TRANSITIONS=230} [2024-06-14 12:40:31,037 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-14 12:40:31,037 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 230 transitions, 2780 flow [2024-06-14 12:40:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:31,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:31,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:31,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:40:31,037 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)] === [2024-06-14 12:40:31,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1460264212, now seen corresponding path program 3 times [2024-06-14 12:40:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:31,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67914852] [2024-06-14 12:40:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67914852] [2024-06-14 12:40:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67914852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:32,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:32,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113881226] [2024-06-14 12:40:32,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:32,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:32,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:32,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 230 transitions, 2780 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:32,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:32,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:32,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:35,086 INFO L124 PetriNetUnfolderBase]: 11250/15545 cut-off events. [2024-06-14 12:40:35,086 INFO L125 PetriNetUnfolderBase]: For 436445/436465 co-relation queries the response was YES. [2024-06-14 12:40:35,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103007 conditions, 15545 events. 11250/15545 cut-off events. For 436445/436465 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84228 event pairs, 4051 based on Foata normal form. 26/15540 useless extension candidates. Maximal degree in co-relation 102951. Up to 14077 conditions per place. [2024-06-14 12:40:35,262 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 128 selfloop transitions, 148 changer transitions 0/282 dead transitions. [2024-06-14 12:40:35,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 282 transitions, 3768 flow [2024-06-14 12:40:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 12:40:35,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-14 12:40:35,263 INFO L175 Difference]: Start difference. First operand has 129 places, 230 transitions, 2780 flow. Second operand 8 states and 202 transitions. [2024-06-14 12:40:35,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 282 transitions, 3768 flow [2024-06-14 12:40:35,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 282 transitions, 3420 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:35,642 INFO L231 Difference]: Finished difference. Result has 131 places, 234 transitions, 2838 flow [2024-06-14 12:40:35,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2838, PETRI_PLACES=131, PETRI_TRANSITIONS=234} [2024-06-14 12:40:35,643 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-14 12:40:35,643 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 234 transitions, 2838 flow [2024-06-14 12:40:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:35,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:35,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:35,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:40:35,644 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:35,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1460560882, now seen corresponding path program 4 times [2024-06-14 12:40:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:35,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459610395] [2024-06-14 12:40:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:35,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459610395] [2024-06-14 12:40:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459610395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889268403] [2024-06-14 12:40:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:37,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:37,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 234 transitions, 2838 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:37,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:37,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:37,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:39,697 INFO L124 PetriNetUnfolderBase]: 11270/15573 cut-off events. [2024-06-14 12:40:39,697 INFO L125 PetriNetUnfolderBase]: For 468782/468802 co-relation queries the response was YES. [2024-06-14 12:40:39,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105735 conditions, 15573 events. 11270/15573 cut-off events. For 468782/468802 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84473 event pairs, 3665 based on Foata normal form. 26/15568 useless extension candidates. Maximal degree in co-relation 105678. Up to 13517 conditions per place. [2024-06-14 12:40:39,829 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 120 selfloop transitions, 163 changer transitions 0/289 dead transitions. [2024-06-14 12:40:39,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 289 transitions, 3864 flow [2024-06-14 12:40:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 12:40:39,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-14 12:40:39,897 INFO L175 Difference]: Start difference. First operand has 131 places, 234 transitions, 2838 flow. Second operand 8 states and 206 transitions. [2024-06-14 12:40:39,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 289 transitions, 3864 flow [2024-06-14 12:40:40,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 289 transitions, 3492 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:40,317 INFO L231 Difference]: Finished difference. Result has 133 places, 238 transitions, 2909 flow [2024-06-14 12:40:40,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=133, PETRI_TRANSITIONS=238} [2024-06-14 12:40:40,318 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-14 12:40:40,318 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 238 transitions, 2909 flow [2024-06-14 12:40:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:40,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:40,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:40,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:40:40,319 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)] === [2024-06-14 12:40:40,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash 742627559, now seen corresponding path program 2 times [2024-06-14 12:40:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:40,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206148393] [2024-06-14 12:40:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206148393] [2024-06-14 12:40:41,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206148393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:41,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:41,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:40:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821479866] [2024-06-14 12:40:41,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:40:41,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:40:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:40:41,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:41,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 238 transitions, 2909 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:41,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:41,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:41,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:43,553 INFO L124 PetriNetUnfolderBase]: 11259/15578 cut-off events. [2024-06-14 12:40:43,553 INFO L125 PetriNetUnfolderBase]: For 503707/503731 co-relation queries the response was YES. [2024-06-14 12:40:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108366 conditions, 15578 events. 11259/15578 cut-off events. For 503707/503731 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84569 event pairs, 4066 based on Foata normal form. 23/15595 useless extension candidates. Maximal degree in co-relation 108308. Up to 15229 conditions per place. [2024-06-14 12:40:43,811 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 225 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-14 12:40:43,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 260 transitions, 3499 flow [2024-06-14 12:40:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:40:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:40:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 12:40:43,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-14 12:40:43,812 INFO L175 Difference]: Start difference. First operand has 133 places, 238 transitions, 2909 flow. Second operand 6 states and 135 transitions. [2024-06-14 12:40:43,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 260 transitions, 3499 flow [2024-06-14 12:40:44,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 260 transitions, 3062 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:44,284 INFO L231 Difference]: Finished difference. Result has 133 places, 238 transitions, 2542 flow [2024-06-14 12:40:44,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2542, PETRI_PLACES=133, PETRI_TRANSITIONS=238} [2024-06-14 12:40:44,285 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-14 12:40:44,285 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 238 transitions, 2542 flow [2024-06-14 12:40:44,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:44,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:44,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:40:44,286 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)] === [2024-06-14 12:40:44,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -379349179, now seen corresponding path program 1 times [2024-06-14 12:40:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:44,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989203547] [2024-06-14 12:40:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989203547] [2024-06-14 12:40:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989203547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:45,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:45,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:40:45,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606937545] [2024-06-14 12:40:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:45,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:40:45,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:45,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:40:45,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:40:45,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:40:45,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 238 transitions, 2542 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:45,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:40:45,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:47,464 INFO L124 PetriNetUnfolderBase]: 9873/14072 cut-off events. [2024-06-14 12:40:47,464 INFO L125 PetriNetUnfolderBase]: For 438655/438663 co-relation queries the response was YES. [2024-06-14 12:40:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94634 conditions, 14072 events. 9873/14072 cut-off events. For 438655/438663 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 79358 event pairs, 3453 based on Foata normal form. 8/14077 useless extension candidates. Maximal degree in co-relation 94575. Up to 13379 conditions per place. [2024-06-14 12:40:47,709 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 233 selfloop transitions, 25 changer transitions 0/265 dead transitions. [2024-06-14 12:40:47,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 265 transitions, 3284 flow [2024-06-14 12:40:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:40:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:40:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:40:47,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-14 12:40:47,710 INFO L175 Difference]: Start difference. First operand has 133 places, 238 transitions, 2542 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:40:47,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 265 transitions, 3284 flow [2024-06-14 12:40:48,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 265 transitions, 3203 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:48,098 INFO L231 Difference]: Finished difference. Result has 134 places, 242 transitions, 2576 flow [2024-06-14 12:40:48,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2576, PETRI_PLACES=134, PETRI_TRANSITIONS=242} [2024-06-14 12:40:48,099 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-14 12:40:48,099 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 242 transitions, 2576 flow [2024-06-14 12:40:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:48,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:48,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:48,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:40:48,099 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)] === [2024-06-14 12:40:48,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 743584901, now seen corresponding path program 2 times [2024-06-14 12:40:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181775089] [2024-06-14 12:40:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:48,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:48,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181775089] [2024-06-14 12:40:48,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181775089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:48,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:48,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:40:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443346937] [2024-06-14 12:40:48,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:48,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:40:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:40:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:40:49,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:40:49,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 242 transitions, 2576 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:49,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:49,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:40:49,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:51,252 INFO L124 PetriNetUnfolderBase]: 9827/13997 cut-off events. [2024-06-14 12:40:51,252 INFO L125 PetriNetUnfolderBase]: For 459702/459704 co-relation queries the response was YES. [2024-06-14 12:40:51,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95146 conditions, 13997 events. 9827/13997 cut-off events. For 459702/459704 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 78741 event pairs, 3465 based on Foata normal form. 2/13991 useless extension candidates. Maximal degree in co-relation 95086. Up to 13317 conditions per place. [2024-06-14 12:40:51,370 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 227 selfloop transitions, 26 changer transitions 0/260 dead transitions. [2024-06-14 12:40:51,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 260 transitions, 3138 flow [2024-06-14 12:40:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:40:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:40:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:40:51,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:40:51,371 INFO L175 Difference]: Start difference. First operand has 134 places, 242 transitions, 2576 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:40:51,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 260 transitions, 3138 flow [2024-06-14 12:40:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 260 transitions, 3083 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:51,740 INFO L231 Difference]: Finished difference. Result has 137 places, 242 transitions, 2582 flow [2024-06-14 12:40:51,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2521, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2582, PETRI_PLACES=137, PETRI_TRANSITIONS=242} [2024-06-14 12:40:51,741 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-14 12:40:51,741 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 242 transitions, 2582 flow [2024-06-14 12:40:51,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:51,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:51,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:40:51,742 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:51,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -110424026, now seen corresponding path program 1 times [2024-06-14 12:40:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534150346] [2024-06-14 12:40:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:52,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534150346] [2024-06-14 12:40:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534150346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216062849] [2024-06-14 12:40:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:52,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:52,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 242 transitions, 2582 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:55,684 INFO L124 PetriNetUnfolderBase]: 11820/16425 cut-off events. [2024-06-14 12:40:55,684 INFO L125 PetriNetUnfolderBase]: For 618303/618311 co-relation queries the response was YES. [2024-06-14 12:40:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115905 conditions, 16425 events. 11820/16425 cut-off events. For 618303/618311 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 90933 event pairs, 3206 based on Foata normal form. 34/16449 useless extension candidates. Maximal degree in co-relation 115844. Up to 12932 conditions per place. [2024-06-14 12:40:55,837 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 169 selfloop transitions, 136 changer transitions 0/311 dead transitions. [2024-06-14 12:40:55,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 311 transitions, 4030 flow [2024-06-14 12:40:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:40:55,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-14 12:40:55,838 INFO L175 Difference]: Start difference. First operand has 137 places, 242 transitions, 2582 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:40:55,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 311 transitions, 4030 flow [2024-06-14 12:40:56,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 311 transitions, 3938 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:56,258 INFO L231 Difference]: Finished difference. Result has 140 places, 251 transitions, 3046 flow [2024-06-14 12:40:56,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=140, PETRI_TRANSITIONS=251} [2024-06-14 12:40:56,259 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-14 12:40:56,259 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 251 transitions, 3046 flow [2024-06-14 12:40:56,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:56,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:56,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:56,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:40:56,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:40:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -21858266, now seen corresponding path program 2 times [2024-06-14 12:40:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:56,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420679159] [2024-06-14 12:40:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:56,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:57,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420679159] [2024-06-14 12:40:57,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420679159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:57,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:57,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639329884] [2024-06-14 12:40:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:57,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:40:57,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 251 transitions, 3046 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:57,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:57,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:40:57,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:00,373 INFO L124 PetriNetUnfolderBase]: 12223/17022 cut-off events. [2024-06-14 12:41:00,374 INFO L125 PetriNetUnfolderBase]: For 693766/693774 co-relation queries the response was YES. [2024-06-14 12:41:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126533 conditions, 17022 events. 12223/17022 cut-off events. For 693766/693774 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95289 event pairs, 4221 based on Foata normal form. 34/17046 useless extension candidates. Maximal degree in co-relation 126470. Up to 14571 conditions per place. [2024-06-14 12:41:00,546 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 163 selfloop transitions, 144 changer transitions 0/313 dead transitions. [2024-06-14 12:41:00,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 313 transitions, 4366 flow [2024-06-14 12:41:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 12:41:00,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-14 12:41:00,548 INFO L175 Difference]: Start difference. First operand has 140 places, 251 transitions, 3046 flow. Second operand 8 states and 210 transitions. [2024-06-14 12:41:00,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 313 transitions, 4366 flow [2024-06-14 12:41:01,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 313 transitions, 4157 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:01,247 INFO L231 Difference]: Finished difference. Result has 146 places, 258 transitions, 3353 flow [2024-06-14 12:41:01,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3353, PETRI_PLACES=146, PETRI_TRANSITIONS=258} [2024-06-14 12:41:01,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-14 12:41:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 258 transitions, 3353 flow [2024-06-14 12:41:01,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:01,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:01,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:41:01,249 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:41:01,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash 947464461, now seen corresponding path program 1 times [2024-06-14 12:41:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:01,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328319052] [2024-06-14 12:41:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328319052] [2024-06-14 12:41:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328319052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:02,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:41:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332318709] [2024-06-14 12:41:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:41:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:41:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:41:02,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:41:02,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 258 transitions, 3353 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:02,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:02,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:41:02,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand